Rear wheel slows down

[albal]

Hi
Has anyone any idea why my rear wheel slows down too quickly and comes to a stop as opposed to gradually stopping??? I first guessed it was something in the spindle ie; sand /grit any clues???

 

[fossyant]

I assume you mean when off the ground - check cone/bearing tightness, rubbing brake blocks, or a worn freewheel / freehub

 

[Radius]

First thing check the brakes aren't rubbing. May be a stupid and condescending suggestion, but may be the answer

 

[albal]

Thanks for advice. Bike is less than yr old,(allez 08) and brakes not rubbing, the guy who sold it to me cannot find receipts for warranty, that was my first thought, now i am struggling.

 

[spandex]

Can you ask him to take it back into the shop for you?

 

[jimboalee]

You might have problems going back to the guy who sold you the bike if it was a private sale. The bike was 'sold as seen', and I don't think a LBS would honour warranty on a 'used' bike. They will argue it was mistreated by the previous owner.

Buying second-handers is risky. Some are perfick. Some go wrong, are temporary fixed and sold quick if they are over twelve months old.

Although it is an 08 model, it might have hit the shops in October - November 07.

Is the hub a 'sealed race' ( cartridge ) unit. The precision races may not be parallel. They will require a LBS to press them square.

 

[peanut]

Yes if the hub is an oversize one with cartridge bearings as apposed to ball bearing races,as Jimbo says they can bind if the axle nuts are over-tightened. Releasing the axle nuts will not appreciably improve the free running of the bearings once they have been overtightened because they can crush from the sides .

You'll probably need to replace them.They are standard sized cartridge bearings and can be bought anywhere not just cycle shops. You'll need to order by size.
If they are a ball rearing race then they might improve if you adjust the cones but you would be better to replace these too probably.
With a good spin the wheels should spin for a ninute or more

 

[albal]

Thanks guys> peanut > I think you were right, the bolts were VERY tight on the spindle and think the bearings have been crushed, no luck with the previous owner so will take it to LBS.
I find it hard to beleive it has come from the shop like this?????!!
Well we learn from our misakes i guess.......
Next time I will give a bike a thorough going over.

 

[tyred]

Make sure the bearings are well greased as well as I know someone who took delivery of a new bike, wondered why it was so hard to pedal and closer inspection revealed the hubs had been assembled dry!

 

[jimboalee]

It may have been the previous owner. Some folk think nuts have to be dead tight, which they don't in numerous situations.

The hub manufacturer should specify the tightening torque of the their nuts, fernurk.

But don't buy a torque wrench from Halfrauds. Halfords torque wrenches are a mile out, as has been discussed on another forum, The Jensen Owners Club.

 

[peanut]

something to watch very casrefully with these cartridge hubs. They have shim or slip distance tubes which fit over the axle and space the whole assembly. They are there to prevent overtightening from crushing the cartridge bearings. If the tubes are left out or the wrong ones put in then the bearings will crush whatever tightness they are set at.
These tubes are extremely precise to fractions of a mm .

 

[albal]

The guy who sold it me an old school friend has found all documents for the bike. They will be in the post, it worth trying the dealer first i guess.
Thanks for all the advice.