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- From: andrei@namao.uucp (Andrei Chichak)
- Subject: Re: removing wheel hop (help!)
- Message-ID: <andrei.727723245@namao>
- Sender: news@kakwa.ucs.ualberta.ca
- Nntp-Posting-Host: namao.ucs.ualberta.ca
- Organization: University Of Alberta, Edmonton Canada
- References: <1993Jan18.162546.28722@news.uakron.edu>
- Date: Fri, 22 Jan 1993 17:20:45 GMT
- Lines: 30
-
- markm@iris.polymer.uakron.edu (Mark Alan Matties) writes:
-
- >i've got a hop in the rear wheel of my trek 820 (sorry, i don't remember the
- >manufacturer or width off hand, but it's the wide "default" wheel that comes with the
- >bike - nothing too fancy) and was wondering whether someone could advise me on
- >banging it out. i don't think that it's very bad, but i'm getting pretty tried
- >of the pulsing when i brake. (i really can't afford a new wheel.)
-
- >thanks,
- >msquared
- >--
-
- >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- >mark alan matties u of akron
- >markm@iris.polymer.uakron.edu dept of polymer science
- >"aoibheann beatha an scola/ire" akron, ohio, usa
-
- sounds like you have a flat spot in the rim, not a hop (hop is usually caused
- by the rim being eccentric with the hub (due to spoke tention problems)).
- A flat spot it caused by a hard radial blow to the rim causing distortion
- in the radial direction with an accompanied buldging of the sides of the rim.
- This can be pulled out with a rim pulling press
- at a good bike store, or if you are really cheap you can hammer on the
- sides of the rim so that it ends up being the same width as the rest of
- the rim. This won't get rid of the flat spot but it will reduce the brake
- pulsing. If the problem is just a bit of un-true-ness in the wheel then
- get it trued.
-
- Andrei Chichak
- andrei@namao.ucs.ualberta.ca
-