Used Items 2 x Empella Bonfire SL frame and Forks, comes with seat clamp, FSA headset with integrated cable hanger. Size Seat tube 57cm C-2-T, Top Tube 55cm C-2-C, Head tube 13cm Both bought from new 3 years ago still in decent condition. £300 each or £550 for both 2 x Sram Rival (black) 175mm GXP crank arms. 130BCD, Will include BB but will proberbly need replacing soon? £40 each 2 x Sram Rival Rear mech in Black, jockey wheels recently replaced good condition, £30 each 2 x Sram…See More
"In the end I have gone for 172.5. I think the idea of keeping the same crank lengths as on my other bikes makes sense. Previously ive used 175 but thats just from what people have said is the norm. I'll let you know if anything…"
"More ground clearance with shorter cranks, but higher minimum centre of gravity height. I prefer 170mm or 172.5mm for offroad, but in my opinion its one of the less important bike fit variables.
I think the so-called science behind crank length is…"
"Good question, wonder what the science is behind it, any boffins out there know?
Does the geometry of different bikes change things particularly with cross?
Does your height or leg length make a difference to what crank length…"