Quote:
Originally Posted by Dave
A modern bike should get it's comfort from wider tires run at lower pressure. At my 135 lb weight, I use 28mm front and 30mm back with the same 52-55 psi in both tires. I could also run 30mm in both and drop the front pressure by 3-4 psi. I use the Zipp pressure calculator for a starting point.
Your builder should have some opinion on the combination of HTA and fork offset that would give the desired trail and front-center dimension. My frames are next to smallest size and have 67-68mm of trail. Some models use the same 58mm across the board.
These days, I use stack and reach to determine what size I need, since the numbers and letters used today mean nothing.
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I am 140lbs and use 28mm tires 68psi rear and 65 psi front. The roads here are not bad and I find this works well for me. I do like some road feedback not total isolation.