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Hub size question...(2 posts)

Hub size question...cyclochip
Jun 20, 2003 3:57 PM
I've got a CrossCheck, so I can run either MTB or road hubs on it.

I tweaked my original rear wheel (w/ a MTB hub) about 6 months after I got it, and replaced it w/ a 105 hub wheel. I noticed right away that my shifting in the rear was off, and had to do some adjusting to get it back right.

I'm wanting to build up another back wheel for the bike now, so I can have a road wheelset and an off-road set. (I still have the original front wheel lying around.)
I'd LIKE to use the original MTB hub that came on the bike, but I have a feeling that swapping between the two differently spaced hubs would throw my shifting all out of whack.

Am I assuming correctly here? Would I be better off buying an inexpensive road hub for the off-road wheelset? I'm trying to go cheaply on this project, but I don't want to sacrifice shifting performance to save a few bucks...

Thanks for any advice you can give...
re: Hub size question...Val_Garou
Jun 20, 2003 4:44 PM
I believe that you are indeed assuming correctly, as the Surly's rear spacing is 132.5--allowing you to run either a 135mm MTB or 130mm road hub. What happens, then, when you switch hubs is that you must stretch or compress that rear spacing to match the hub in use. Your derailleur, mounted to the frame, will therefore change it's reletive position enough to frustrate your efforts at smooth shifting.

I'd buy a cheap road hub and have at it. Hubs are pretty durable all-around anymore, and it's not like you're going to be hucking 5 foot drops. Are you? :)