Originally Posted by
jimc101
MTB bars are sized by the stem clamp diameter (31.8 or 25.4), not the component size, these (MTB parts) are all the same size.
For Sturmy Archer, have you checked their website?, what about Shimano?
For width, for the last 5 years or so, handle bars have been getting wider and wider so you may need to look for some older bars, or be prepared to cut some down to the size you want/
The issue is the grip size. For instance, most modern road bike drop bars are like 23.5 mm in diameter, while most mtn bike bars are 22.2mm in diameter. The SA shifter is sized for a 22.2mm handlebar.