Surly Bikes let out a little bit today about what they will be doing at upcoming tradeshow Frostbike. Of interest to the fat bikers of the world who have the new crop of super-fat 5″ tires, they are going to have the first SRAM-supported X-Sync chain rings that allow you to combine 1×11 drive trains with 190/197mm spaced rear ends, since SRAM only supports 170/177 rear ends with their own cranks.
Sure, people have been doing this for some time with RaceFace, eThirteen and other cranks or Wolftooth ring upgrades. However, SRAM says that their drive trains work best when using X-Sync chain rings, as they are not the same as other “wide/narrow” tooth profile chain rings.
Surly worked with SRAM to license the profile, but also make it from stainless steel (oh my!), and make it in the antiquated 5x94mm bolt circle standard they (charmingly) insist on keeping around on their OD cranks. While the OD cranks, combined with a solid, machined stainless chain ring might not be light, it will be the first SRAM supported crank set for the 190/197mm rear end chain line.
Take a click inside, they are not just making the chain ring, but made it to enable a pretty cool bike too….
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