serviceguy
Well-Known Member
I finished building the 27.+ wheel set that I will use to replace the 29” wheels on my El Mar. According to my calculation going from a 29”x2.35” Tire to a 27.5”x2.8” tire will lower my bb by 7mm. Is that significant in any way? I can raise the head tube to compensate by 20mm or just leave it alone...always one more question!