¿dònde està el leopardo ?
¿donde està el pp?
pie descalzo
Venture West '12 from James Fuller on Vimeo.
No matter how awesome the riding in Whistler and Pemberton is, it's gone once the snow hits. Spending copious amounts of time with Steve this summer I really noticed a few weak spots in his training program, so Mikey and I headed to Vancouver Island to guide him to further World Cup wins. Checking out the forecast before we were headed out, it looked to be the rainiest 4 days in recent memory. So I grabbed a 15 pack of Lucky and headed to the Island to check out the Island life. Growing up in Whistler, I've been exposed to sick trails, rowdyism, bonfires, chainsaws, fireworks and numerous other exciting activities, but nothing would prepare me for the Island.
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Review: SRAM X0 2×10 with Grip Shift
By Brian Mullin February 02, 2013 FEATURE ARTICLES GEAR/APPAREL PRO REVIEWS
Introduction by Francis Cebedo:
SRAM revolutionized drivetrains with their introduction of the modern 2×10 system a couple years ago. They wanted to give you more functionality with less complexity. They then went back to the archives to resurrect Grip Shift by perfecting its accuracy and shifting action. Have they succeeded in both endeavors? Read on and find out.
If you are itching to ride and want to jump ahead to Brian’s conclusions, take the leap over HERE.
SRAM can trace its roots back to the Grip Shift, and through time the drivetrain company has evolved into one of the leading bike component companies in the world, and now has mountain, road and urban drivetrain systems. The SRAM 2×10 system is a couple of years old now, and what was once an oddity has become commonplace. The 2×10 system has some great virtues, such as reduced cross-chaining, quicker and smoother front shifting, more efficiency, decreased overlapping gear ratios, weight savings and a narrower Q-Factor. SRAM’s 2×10 X0 got the trickled down technology from their flagship XX group, which was the first mountain bike oriented 2×10 on the market, but the X0 comes with a better price point and greater durability and toughness, and only a slight increase in weight.
SRAM X0 2×10
The trick Truvativ X0 crank arms are made from carbon fiber with a hollow foam core construction, and utilize a separate bolt-on spider for the chainrings, which use their fast X-Glide shifting technology. It comes in a variety of gear options, including 22-36, 24-38, 26-39 and 28-42, which then mates to the 11-36 cassette. The X0 front derailleur has a narrower design to match up with the 2×10 system, while the X0 rear derailleur accepts the large 36-tooth cog and retains their quick 1:1 actuation ratio. The X0 shifters are available as the ultra sweet Grip Shift or the normal trigger shifters.
Testing Rig and Terrain
Testing was performed on my medium Ibis Mojo HD with the Cane Creek Double Barrel Air rear shock, and multiple forks, including the Magura TS8 and FOX VAN 160. I am 5’9″, weigh in at 155 lbs, and I have mostly ridden in the West, including vast portions of the Colorado Front Range, Sedona, Moab, Fruita/GJ and many parts of the Colorado mountains. The testing terrain is predominantly loose rocky conditions, with many long steep climbs and descents, rock gardens, slick rock, an occasional smooth singletrack and lots of ugly, loose gravel. I tend to enjoy gnarly technical terrain, where precise steering and maneuvering are required and intricate follow-through, and full commitment is advised. The local conditions are usually dry, with lots of gravel, sand and fine dirt, which gets into everything, and tends to wreak havoc on seals, bearings, chains, cassettes, chainrings.
Tested:
Cranks – X0 GXP 10spd 175mm 24-38-Bashguard in Silver
Rear derailleur – X0 long cage 10spd in Silver
Front derailleur – X0 High Direct Mount, 2×10 in Silver
Shifters – X0 Trigger in Silver and X0 Grip Shift in Silver
Cassette – XG-1080 11-36
Chain – 1091R
X0 Front Derailleur
The 2×10 X0 front derailleur is available in four mounting options, High Clamp, Low Clamp, High Direct Mount (tested) and Low Direct Mount, and retails for $74. It can be used in a wide range of 2×10 gearing with a maximum of a 15-tooth differential between the smaller and larger rings. It was specifically designed for 2×10, so the cage is shorter and narrower than a 3x system. The widely spaced pivots of the aluminum links offer stiffness, while the steel cage gives durability and is shaped to work in harmony with their X-Glide front shifting technology. The X0 front worked nicely, and rolled up and down smoothly, without any stickiness, slop or clunking. There has been a great deal of improvements in the SRAM front over time, and they feel on par with Shimano’s offering. Using Grip Shift made the front shifting short, quick and lightning fast, in contrast to the long throw on the triggers. Setting the height of the high direct mount version was simple, and it only needed minor high and low screw adjustments. I didn’t have any cable stretch issues, and only minimal trimming was required. The front has done its job admirably with great durability, and the parallelogram has retained smooth operation through its arc, without any issues during the test period.
X0 Rear Derailleur
The X0 rear derailleur is available in three cage lengths, short, medium and long (tested), and comes in Silver, and Black, Blue, Red and Gold graphic colors, and retails for $255. The inner pulley cage is made from aluminum while the outer is a carbon fiber composite, and the parallelogram linkages are forged aluminum with wide pivots to ensure linkage stability and stiffness. It has sealed bearing pulleys, and utilizes their Exact Actuation Ratio technology, which is a 1:1 actuation ratio (shifter cable travel : derailleur movement), and the EA offered simple, stable and easy shifting, regardless of the load applied, the cog set spacing and cable tension. Cable routing into the derailleur uses their Direct Route Technology, in which it connects directly to the actuation mechanism to lessen damage and decrease friction and input effort. I have always liked the 1:1 actuation ratio of SRAM’s rear derailleur’s, and the X0 rear offered crisp shifts that had a nice detent, without any ghost movements or over shifting. Rolling up or down the cassette worked just fine, and with the aid of the Grip Shift, you could do large swaths of gears at once. With the big 11-36 range of 10 speeds on the cassette, it took a bit of tweaking of the high and low limit screws to get all the gears rolling properly, and the longer cable meant occasional adjustments were needed to keep things sharp and slop free. The rear has been pretty durable, and has taken a lot of abuse, slamming and scrapping past rock squeezes and ledges, and the only thing it has suffered is some cosmetic scratches along the outside edge. The spring tension has stayed taut, so shifting has been crisp, and the cage pulleys have continued to roll with low friction, and the parallelogram pivot points have retained smooth movement and actuation.
PowerChain 1091R Chain
The PowerChain 1091R is made from Nickel silver with Chrome hardened pins and hollow rivets, and retails for $65. It uses the highly functional PowerLock tool-less connecting link, which always makes installing and removing a chain much easier. When the chain was new, it shifted without any issues even when I forgot to lube it, but after eight months of heavy abuse, and I’m getting some ghost shifts. I tend to be a low gear granny monster, wreaking havoc and creating huge amounts of torque, and the chain hasn’t failed or died prematurely.
Truvativ X0 Cranks
The Truvativ X0 cranks are available in 2X10 version with 22-36, 24-38 (tested), 26-39 and 28-42 gearing options, and PF30, BB30, GXP and GXP PF bottom bracket configurations (not included). They come in Silver, and Black, Blue, Red and Gold graphic colors, 170 and 175 lengths, and retail from $444 – $513. The three-piece Truvativ X0 cranks are comprised of the drive side arm with attached spindle, non drive side arm and bolt-on chainring spider. The crank arms are hollow carbon fiber composite with a non-structural foam core and aluminum inserts at the bottom bracket and pedal which are co-molded in place. The forged aluminum spider meshes onto a spline on the inside on the non-drive side arm, and in this tested version, it is comprised of a 24 tooth chainring, 38 chainring and a bashguard. The chainrings are made from CNC 7075 aluminum, and the bashguard is carbon fiber. With this 24-38 gearing and the optional 22-36 version, the odd spacing is 104/64 BCD, which is required to fit everything within the confines of the system.
The Truvativ X0 cranks have a minute amount of flex if you stand on the arms during a technical move, and it feels like the spindle twists, and not the arms directly, but I never felt any loss of power when cranking away while pedaling. The arms are stiff, and have been durable, with only the typical cosmetic shoe rub on the outside. The pedal inserts haven’t loosened, which can be a culprit on carbon fiber and aluminum glue-in interfaces. The ends of the carbon arms can get chipped slightly if you hit lots of rocks (like I do), so I added some crank arm boot protectors.
The 24-38 chainrings nicely meshed with the 11-36 cassette, especially if you ride a 29er, or you’re a granny gear aficionado. Their X-Glide technology functions well, and the synergy of aligning the chainring pick-up rivets to the chain pivot pin gives smoother shifts on any terrain or power mode. The closely spaced engagement zones around the circumstance of the rings, gives faster shifts under any load, though I found it somewhat clunky during the transitions and not as smooth as Shimano. On occasion, the transition of the 24 to the 38 could be temperamental, and I think a closer ratio, such as 24-36 would be beneficial. They have options for other gearing ratios, including 26-39 and 28-42, and the already mentioned micro gearing of 22-36 and 24-38.
The 38×11 (chainring/cassette) gearing isn’t the most functional when you want to press the bike to Mach 1, but it will get you going at a decent clip, and this set up is meant for AM and AT riding, not full on XC racing. The 38T offers good obstacle clearance and the 24T granny keeps the gear inches low (gear ratio x wheel size), which is especially nice for 27.5″ and 29″. After about eight months the 24T granny is worn out, and shifts aren’t quite as crystal clear like they were when new, but small chainrings get an extreme amount of torque placed on themselves, so it exasperates the wearing. They don’t yet sell individual chainrings, so you’ll need to buy the entire spider to replace anything, and even though $140 seems expensive, you do get two fresh chainrings and a bashguard in one complete package.
The bashguard has gotten some heavy abuse, and is showing some fraying and shredding of the carbon fiber material. It is only happening at two locations, right smack opposite the spindle when the crank arms are parallel to the ground. I think a more robust thickness might help with the longevity, but at least it prevented damage to the large chainring.
The bottom bracket includes Truvativ’s new Gutter sealing system, which has a better seal design, with less drag, greatly improved water resistance and bearing durability. It has been durable and smooth rolling throughout it usage, without any grittiness or stiction, and the cranks easily spun through them.
XG-1080 Cassette
The XG-1080 is a 11-36 cassette, with gears of 11, 12, 14, 16, 18, 21, 24, 28, 32 and 36, and retails for $280. The XG-1080 cassette’s seven biggest cogs are riveted to each other using steel pins, and the largest is made from 7075-T6 aluminum, while the remaining ones are stamped 4130 chromoly steel. The outer aluminum cog and the upper cage are tied into a metal sleeve which transfers the load onto the freehub body. The last three cogs are stacked onto the cluster in the typical cassette fashion, and everything gets tied down with an aluminum lock ring. The metal sleeve had some restrictive tolerance issues on several test freehub bodies, and lightly sanding the inside allowed the cassette to slip on and off.
SRAM has come light-years ahead on the ramps and engineering of their cassettes, and they offer faster, cleaner and smoother shifting, even when used under heavy loads, and they have closed in on the silkiness of XTR. The 11-36 cassette worked ideally when combined with the 24×38 cranks, especially if you like a good granny, although you do miss the crankability at high speed (38-11). I liked the 38×36 ratio (Big ‘Uns), as it could be used on quite a few mild hills, and those with lots of rolling and undulating terrain, and it shined on steep grunt fire roads. I have been pretty happy with the longevity of the cassette, and it keeps shifting just fine, long after the chainrings have started to give wear issues.
X0 Grip Shift
The X0 Grip Shift is light-years ahead of its predecessor, and offers some amazing technology and features, and everything works together for precise shifting that operates in a silky-smooth manner. You can refer to a full review on the Grip Shift. The X0 Grip Shift is an excellent system, offering smooth, crisp, distinct and solid shifting, without any mis-shifts or dropped gears. The front gives a decisive and short throw that almost feels effortless to move between the chainrings. The rear allows huge swaths of gears to be rolled through on the cassette, or just one at a time, making for precise and easy selections. It is available in Black and Silver, and retails for $225.
X0 Triggers
The X0 trigger shifter is MatchMaker X compatible, and comes in Silver, and Black, Blue, Red and Gold graphic colors, and retails for $258. It has adjustable forged aluminum levers, forged body and alloy covers. In contrast to the Grip Shift, it takes a higher level of effort to switch gears, though the changes offer nice tactile clicks. An excellent thing about triggers, and especially the X0, is the ease and quickness of a down shift, and it only requires a slight dab of the finger to pop down. The forward lever has a nice subtle grittiness to it, so gloves or fingers adhere to the surface without sliding around, even when bumping down a jarring trail. The strong click and movement when shifting gives good feedback, so you are aware of gear changes, and I never had any sort of over shifting problems.
X0 Measured Specs:
Front – 125 grams
Rear – 201 grams
Cassette – 239 grams
Gripshift w/ cables 282 grams
Trigger w/ cables + MM clamps – 226 grams + 53 grams = 279 grams
Cranks – 794 grams total = drive arm w/ spindle -506 grams + non drive arm 181 grams + bb 107 grams
Chain – 257 grams
Bottom Line
The SRAM 2×10 system functions like a fluid machine, and offers quick and smooth shifting, with good durability across most of its components. Some of the highlights of the X0 2×10, are the fast X-Glide shifting technology, Grip Shift shifters, excellent shifting under loads, 1:1 derailleur actuation and a quiet drivetrain.
The hollow core carbon fiber cranks are plenty stiff, and their trick separate bolt-on spider makes replacement and swapping out simple. I am extremely happy with the addition of the micro gearing options of 22-36 and 24-38, to go along with the more race flavored 26-39 and 28-42. It makes a granny gear lover’s heart go a flutter! Combine the chainring set up with the functional gearing of the 11-36 cassette, and you get a great selection of gears, for any terrain and environment. The cassette has been very durable, and has retained smooth shifting during the entire test period. The chainrings and chain are showing their age after eight months of heavy abuse, and wear and tear is causing some slight shifting issues, so they need replacement. In the case of the chainrings, that entails replacing the complete spider, and although the $140 price seems steep, it isn’t bad for two chainrings and a bashguard. The front derailleur
is greatly improved over its predecessor, and is on par with the competition, and it swung up and down smoothly without any issues. The rear derailleur has the excellent 1:1 actuation, accepts the monstrous 36-tooth cog, and offered crisp shifts with a firm detent. The Grip Shift were my favorite shifters, due to their fast, crisp and ease of shifting, though the triggers offered good feedback with their firm and tactile clicks.
I spend a lot of time cranking uphill, on long, vicious and unrelenting climbs, and this drivetrain has never let me down. In addition, when pressed hard under extreme loads, such as in technical terrain, it would shift without any undue stress, and would shift whenever required. The nice gear ratio selection, durability, quick shifting and great components make the X0 2×10 a superb system.
Strengths
Cranks – bolt-on spider system
Cranks – stiff carbon fiber arms
Front – shifting is finally on par with the competition
Rear – excellent 1:1 actuation, crisp shifts and nice detent
Rear – durable and tough
Cassette – durable and smooth shifts
Grip Shift – easy, snappy quick and silky smooth shifts
X-Glide – fast and smooth shifts
Bottom bracket – seals keep out contaminants and bearings roll smoothly
Weaknesses
Expensive – Cheaper than XX, but still pricey
Bashguard – needs to be tougher or thicker
Rear – tight spacing with 10 speeds makes for regular tuning
Cassette – inner sleeve has tight tolerances
Chain – not the best longevity
Crank spindle – slight flex/twist when pushed extremely hard
Overall Rating: 4.5 Flamin’ Chili Peppers
SRAM X0 10-Speed Trigger Shifter
MSRP – $123-258
Weight – 232g
Speeds – 2X10
Compatibility – Exact Actuation RD (XX, X0 10) SRAM FD
Technology Highlight(s) Exact Actuation
Finish – Graphics
Technology Highlights – Exact Actuation and MatchMaker X Integrated
SRAM X0 Grip Shift
MSRP – $225 pair
Weight – Clamps, cables, lock on grips with clamps = 287g, Clamps, Cables = 207g, Jaws lock on grips = 80g
Speeds – 10-Speed
Compatibility – SRAM 2X10 & 3X10
Recommended – Group X0
Material – Aluminum Cover
Colors – Black (with X0 red graphic), Silver (with X0 black graphic)
Technology Highlight(s) – Jaws lock on grip, Rolling Thunder, and Speed Metal
SRAM X0 10-Speed Front Derailleur
MSRP: $74
Speeds: 10 speed for 2X10 system (optional 3×10)
Weight: 130 grams
Compatibility: 10 speed only, 36 Tooth
Mount Options: High Clamp / Low Clamp (31.8, 34.9, 38.2), Low Direct Mount (S1, S3) , High Direct Mount
Pull: Top or Bottom
Technology Highlight(s): X-Glide shifting technology and Exact Actuation
SRAM X0 10-Speed Rear Derailleur
MSRP - $255
Speeds – 10-speed for 2X10 system
Weight – 203 grams
Outer Cage – Carbon Fiber Composite
Compatibility – 10-speed only; 36 tooth
Inner Cage – Forged Aluminum
Bearings – Sealed Bearings
Cage Sizes – Short, Medium and Long
Pulleys – Sealed Bearing pulleys
Technology Highlight(s) – Exact Actuation Ratio and Direct Route
Truvativ X0 10-Speed Crankset
MSRP – $444 – $511
X-Glide 2X10 and 3X10 shifting technology, 22-36, 24-38, 26-39, 28-42 and 22-33-44 gearing
New GXP Bottom Bracket System featuring Gutter Seal Technology
Bottom bracket configurations – PF30, BB30, GXP and GXP PF
Arm Material – Carbon Molded
Weight – 728-788g
Compatibility – 2×10, 3×10
Material – Carbon Fiber composite with forged AL spider 7075 CNC AL Chainrings
Technology Highlight – GXP, Exact Actuation and X-Glide
SRAM XG-1080 Cassette
MSRP – $280
Weight – 239 grams
Material – stamped 4130 chromoly steel (cog cluster), AL-7075-T6 (largest cog)
Gear Ratios – 11-36
Speeds – 10 speed
Lock Ring Material – Aluminum, Silver finish
Technology Highlight – X-Glide
SRAM PowerChain 1091R
MSRP – $65
Compatible Gears – 10
Closing Link – PowerLock tool-less connecting link
Outer Plate – Nickel Silver w/Lighting Hole
Inner Plate – Nickel Silver
Pin Treatment – Chrome Hardened Pins
Weight – 255 Grams (114 links)
Rivet Type – Hollow Pin
Recommended Group – SRAM & Shimano Compatible
Colors Outer Plate – Nickel Silver w/Lighting Hole; Inner Plate: Nickel Silver
Technology Highlight – PowerChain II
http://reviews.mtbr.com/review-sram-x0-2x10-with-grip-shift
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