(PeteCresswell) said:I just threw a worn out WTB Mutano Raptor on the front wheel of my utility bike
- which is an original StumpJumper.
It's such a loose fit that the wheel hops because the bead is seated deeper on
one side than the other. With no air in the tire, the casing practically falls
off the wheel.
Steel Stumpie rim is about 30 mm whereas - for instance - a Mavic 717 is about
23 mm.
Bottom line: has something changed since the eighties? Seems like they both SB
nominally 26" rims, yet the Stumpie tapes at least 1/8" less in diameter than
the Mavic.
--
PeteCresswell
http://sheldonbrown.com/gloss_ba-n.html#beadseat
If both the rim and the tire are trying to have a 559 BSD, which is the
standard 26" MTB size, then what you have is just a regular poor fit
due to tolerance stuff. You may be able to get the tire squirmed into
place so that it sits evenly. Do this by inflating to the point where
the tire has its shape but can still be pushed around some on the rim,
then inflating the rest of the way.
BSD is printed on the sidewall of most tires and various places on some
rims.
Also, if the rim doesn't have hooks, that usually causes the problem
you're describing (http://sheldonbrown.com/gloss_ho-z.html#hook). I'm
not familiar with the rims that came on early stumpies and am only
pretty sure that you're saying yours is steel. Many steel rims don't
have hooks.
