Originally Posted by
SpeshulEd
I was talking about and assuming the OP was talking about inside rim width, not outside. Putting a 23mm tire on a rim with a 25mm inner width...essentially stretching the tire 1mm on each side.
Edit, scratch that. I was talking about exterior.
Yes, here's the Enve chart, that's a much bigger differential than 4mm, also they recommend a 23mm...I run 23 in the front, 25 in the back (until I've used up my 23's anyway.:
QUICK SPECS
FRONT / REAR
Material:Carbon Fiber
Rim Depth:35 / 45
Internal Rim Width:18.5 / 16.5
External Rim Width:26 / 24
ERD:584 / 566
Built Weight:1412.4
Rim Weight:367 / 392
Recommended Tire Size:23mm
Larger differential possibly because it is carbon. I dunno. But for many Al rims, the 4 mm differential is petty standard.