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Representing their first foray into carbon fibre, the Santa Cruz Blur XC turned most preconceived notions about lightweight bikes upside down. Incredibly light, yet at the same time much stiffer and stronger than…
Representing their first foray into carbon fibre, the Santa Cruz Blur XC turned most preconceived notions about lightweight bikes upside down. Incredibly light, yet at the same time much stiffer and stronger than its aluminium predecessor, the Santa Cruz Blur XC Carbon 2012 Mountain Bike Frame sets a new benchmark for cross-country expectations. Combining a proprietary one piece carbon fibre layup process with the proven ride of VPP suspension resulted in a bike that offers superb suspension and razor sharp performance. Now freshly redesigned, the Blur XC ups the ante again; a tapered headtube increases front end strength and rigidity, while further optimization of the carbon process has allowed SC to trim even more weight from the bike. Lighter and stronger? rejoice.
Full Carbon frame with one piece lay-up, 105mm rear wheel travel, VPP multi pivot frame design
Fox Float RP23 Kashima
- Shock Mounting Size:
All frame sizes use a 6.5″ × 1.5″ (165×38mm)shock. Mounting hardware on both ends is 22mm wide (21.84mm to be exact), with an 8mm through hole
- Recommended Fork Length:
The Blur XC Carbon accepts 100-120mm forks. We wanted the Blur XC Carbon to be confidence inspiring and race ready at the same time, so we designed it to have a 69.5 degree head angle with a 100mm (471mm axle-crown) fork. The bike can be ridden quite aggressively with this setup, with no weight compromises. This is probably the size fork you would want for xc racing. We definitely wanted to be able to use a 120mm fork on this bike though, and made it accordingly strong. For riding or even racing in rockier terrain, a 120mm fork is pretty fun. Please don’t use a fork over 120mm of travel, as it does exert more force on the frame than it was designed to handle. This also voids your warranty. The geometry will get pretty funny with a longer fork, so you wouldn’t really want to do it anyway
The Blur XC uses a tapered headtube often called “mixed taper”. This setup uses a standard 1.5" external lower cup (49mm bore) and an internal 1 1/8" upper cup (44mm bore). Almost all headset manufacturers make this product
- Bottom Bracket/Crank Size:
The Blur uses a standard 73mm bb shell, so pretty much any cranks you want will fit on there. Just make sure your crankset has a 50mm chainline, and you are good to go. Compatible with the new SRAM XX crankset, but you must use the standard Q-factor version of the cranks (166mm). There is chainring clearance with the 26/39 tooth and 28/42 tooth chainring sets, but the 30/45 will have interference issues. There is only 2-3mm (much less than we typically require) clearance for the 42t ring, so in general the 39t setup will be a safer bet
- Chainguide Compatibility:
There are plenty of guides that will work great on the Blur XC. For a more XC setup, try a top-only guide like the MRP 1x or E13 XCX. We’d recommend the bb mount version for lightest weight. For full chain guidance, we recommend the MRP Lopes, MRP Mini G Sl, or the E13 LG1 Tr
- Front Mech Size:
The Blur XC Carbon requires a bottom swing (high clamp), top pull, 34.9mm front derailleur. Both SRAM and Shimano make models that work. Note that all of our other bikes use a different style derailleur (top swing), so this part will not transfer from another one of our bikes. Tighten the front derailleur on the Blur XC Carbon to 45 in/lbs
Like all Blur models, the XC Carbon uses a 30.9mm post. Make sure it is always inserted a minimum of 100mm into the frame. Carbon frames have a pretty slippery inner surface that makes it difficult to get the seatpost held tight without massive tightening forces at the collar. Use the carbon assembly compound included with the frame to add friction so you don’t need to crank the heck out of the seat collar
- Max Tyre Size:
We never like to make promises here, as tire dimensions vary so much, but pretty much any 2.35" or smaller tire will fit fine
- Max Brake Rotor Size:
Most riders will want 160mm rotors, but a 185mm will fit as well
Frame weight with RP23 Air rear shock – Approx 4.1lbs
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