Discussion in 'Bicycle Mechanics and Repairs' started by Welsh wheels, 23 Feb 2018.
I was wondering if a moderate unfavourable wind was the problem. Strong winds are pretty obvious, but more subtle ones can still make the going tougher.
I would have said so too, until I overtightened the QR on my MTB's rear wheel after putting a big chunky knobbly tyre on. I noticed the 'riding through treacle' effect immediately but put it down to the aggressive tread on the tyre. It was only when I put the bike on my stand and tried spinning the back wheel that I realised that something else was to blame. With a lot of effort I could spin the wheel up to speed, but it would only rotate about 1/10th turn once I stopped turning the cranks. After I adjusted the QR properly the problem went away. The tyre actually rolls pretty well!
He said the wheel spun freely, which is why I suggested others things.
Anyway the wheel is working , thats the main thing .Enjoy the miles
I don't see why a tight QR should have any effect on the free running of a wheel if the cones are set correctly, lock nut tightened and correct spacers fitted.
He did, and that's why I suggested other things too but I thought that somebody else reading my post might be suffering from QR-overtightening-syndrome!
When I was given my Scott to assess for renovation, the first thing I noticed was poor spinning. It came close to needing two people to undo the QRs. Trust me, it makes a massive difference.
Shimano hubs are notorious for being incorrectly adjusted and lubed from new. Here's one of many threads on that theme on another place - Brucey's posts are the key ones to read:
n+1 solves all problems....
I have my CX bike upside down in the kitchen (so I could fix a front wheel puncture) and I just noticed that the back wheel was not spinning properly. With the QR done up very tight the wheel only freewheels for a couple of revolutions after a good spin of the cranks. I adjusted the QR to a reduced tension and repeated the test ... the wheel then span for about 30 revs before coming to a stop. There is still a bit too much friction there (which I will look into later) but it does show that QR tension CAN affect friction in a hub.
Rather than a too tight QR, I think it's badly (too tight) adjusted bearings. The compressive forces of a properly tight QR cause the bearings to bind. Same effect but look to your bearings rather than your QR. This assumes you have cup and cone bearings.
Agreed. Needs slight play when the qr is open so that when compressed they come into correct adjustment.
Thanks. I will take a good look at the bike in the morning.
PS When I said the QR was 'very tight', I think it was actually 'tight enough'. When I loosened it to get the wheel spinning better, I'd say that it was then possibly 'not quite tight enough'. I certainly wouldn't be confident that I could stand up for a steep climb and not pull the rear wheel out of the dropouts!
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