Just a quick behind the scenes view of a few of the steps that go into building a custom wheel. Though I spec'd this rim, I still measure the ERD (effective rim diameter) to verify that the manufacture produced what I spec'd. This is a critical measurement, it is one of the determinants of the eventual spoke length!
The next measurement that I make is the spoke hole offset measurement. Basically, it's the measurement from left spoke hole centerline to the right spoke hole centerline. This measurement only happens on pretty wide rims where the left and right side spokes do not share a common centerline.
That's all for today!
As of late I've been experimenting with mountain bike cassettes for gravel road riding. This set up is a Shimano 11-40 cassette, Sram Force CX1 rear derailleur with a 42t narrow ride chainring up front. I'm enjoying the super low (almost 1:1) low gear. It makes climbing almost (not really when you're a chubby boy like me) easy! The high gear may be a touch low for me, especially with any tail wind or loss of elevation. That's easy to rectify with a bigger chainring or using a xD driver and a cassette with a 10t cog. Racer types may find that they need a 46 or 48 t chainring to make this set up work. For the rest of us mortals, I suspect a chainring in the 38T to 42T will be a great compromise between easy climbing and reasonable flat road speed. What are your thoughts?
David is either found riding his bike or in his workshop working on them!