I have an set of shimano wheels around 5-6 years old that have doen A LOT of k's (in excess of 30,000km). A nipple has broken on one spoke but the brake surface on these wheels is obviously worn. I am wondering if they are worth fixing. These are purely training wheels.How much wear is tolerable?
But how much heavy braking?
How many sets of brake pads have you worn out?
I have no idea how many sets. These are 5 years old, they feel & look worn but how much wear is too much? Like a disc rotor on a car there is a measurement on how thin they can be.
I am leaning on the side of safety if no-one knows, & i wont use them anymore, but if i could get another year or 2 out of them then then they are worth repairing.
Go to a bike shop.
Find a set of rims with 'wear indicator' grooves.
If your wear is as deep as the grooves (depth gauge) take them out of service.
How hard do you brake? The rim needs to resist the squeezing from the caliper.
What psi do you ride? the rim needs to resist the tire from bending outward.
You could adjust your brake pads to contact the higher areas if your sidewalls are tall enough.
If they are getting close to 0.8mm 'thin' I would chuck them. Otherwise, repair it and see how it goes.
You can frighten the rim by overinflating a tyre on it, then if the rim doesn't distort or crack, put ordinary pressure in and keep riding...
Thanks Gemma, without knowing a tolerance i was reluctant to chase a replacement spoke/nipple. Considering their age would you think replacing all the nipples necessary? This one nipple that has broken, seems to have just fatigued. It didnt run thru a pothole or take a knock. These are shimano wheels that have the nipples on the hub not the rim. The pressure test sounds good, i nomally run around 105psi.
Thanks to all for advice.
I would just replace the nipple and run with it. But i am lazy! Are they alloy nipples?
Thats good enough for me, not sure but i'll run a file over it to see. Are they a generic thing or do i need the shimano nipple?
Without seeing them it is hard to say.
Replacing a broken spoke is not that hard.
If you are free Saturday morning come to the community bike workshop you should easily get change out of an hour.
Are they worth fixing? I think so. Put it this way - if you decided to donate them to the Community Bike Workshop - we'd fix them up then sell them, to raise funds. I think quite a few people, would be interested.
One broken spoke or spoke nipple - fairly small job. You could use the tools and wheel jig at the bike workshop (34 Long Street Plympton) Saturday 9-12.
If I remember to bring vernier calipers, you can also measure the wear on the rim.
Take the wheel to a bike shop before, to get the parts . Bike workshop has a few spokes - mostly reclaimed from old mountain bikes - so possible we wont have the right size for your wheel.