[don simon fbpe]

I managed to get spat off the bike last week and and looking for possible reasons. I’m not in a current state to look around the bike as the broken shoulder and muscle damage on right leg is somewhat restricting.

Riding along at about 30km/h and the rear wheel locked up. this caused a slide which ultimately high sided and spat me off, I got back on and rode a further 1.5km. Nothing obviously broken on the bike. Rear mech intact, so not too sure if chain had jumped off the cassette. No potholes, no obstacles. It was an immediate and violent action from the bike (which makes me think that no stress was put on rear mech or hanger) and I’ll give it a good look over when more mobile. No one else was involved.

Any thoughts of the cause in the meantime?

Topic

[Simon E]

don simon fbpe wrote:

don simon fbpe wrote:

Thinking now, it’s probably the sudden cessation of pedalling that buggered the leg, and not being clipped in as I went A over T.

Good to see you back on here but not so good that you’re a bit busted up. Heal fast.

Strange that you could pedal normally afterwards but, without any sign of something external jamming the wheel or drivetrain, I’d suggest the freehub is a distinct possibility.

[don simon fbpe]

I haven’t had a good look at

I haven’t had a good look at the tyre for a flatspot. But I’m sure it’s rear locking up that caused the highside.  Thinking now, it’s probably the sudden cessation of pedalling that buggered the leg, and not being clipped in as I went A over T.

[Mungecrundle]

I can only think you picked
I can only think you picked up something that jammed between wheel and frame. I have seen it happen with a dropped bidon. One in a million event?

Wishing you a swift and complete recovery.

[hawkinspeter]

I’m doing good. Had fun being

I’m doing good. Had fun being furloughed for a bit and am now “working” from home which suits me.

I had a rear wheel lockup when a cassette lockring was loosening up (I make sure they get properly tightened these days) and then got stuck on the frame, but again that required intervention to get the rear wheel moving again and it wasn’t really sudden so it didn’t cause an incident.

If you’ve got disc brakes, would it be possible for a small stone to get stuck between the caliper and the disc? I suppose that could lock up a rear wheel and “disappear” after throwing you off though I’ve never heard of it happening.

[don simon fbpe]

How are you dude?

How are you dude?

Shoulder is the real bummer as I have rollers at home, so they’re out of the question at the moment. I have seen those Peloton trainers that look quite good…. And the adverts make them look as if they’ll improve my lifestyle…

I was pedalling, I’d just overtaken a couple of lads and was pulling away at about 30km/h.

It’s Campagnolo, if that is relevant.

But even if it went fixed, it wouldn’t have jammed, would it? I’d only have noticed when trying to freewheel, no?

I don’t think it’s bearings as a) I rode it for a further 1.5km afterwards without problems (the caveat here is that when the taxi arrived to take me home, I couldn’t remember my address) and b) I’ve just given the wheel a wobble in the frame and all feels good.

It’ll be interesting to give it a proper look over once my shoulder is out of the sling and I can get the bloody thing on a bench.

[don simon fbpe]

Thanks for taking time out

Thanks for taking time out from what must be the busy nut collecting season! How are you?

I’ve checked the spokes as best I can, and no obvious damage. I can’t get my head around it being the cassette or chain as getting caught between spockets, it’d still freewheel. And dropping off either side of the cassette would a) leave damage and probable rip off the mech and b) jam the chain, no?

The chain came off, and wasn’t jammed anywhere.

The real pisser is that I’m about 300km short of 10,000 lockdown kms. Otherwise I’m all good, just a bit broken.

[hawkinspeter]

If the cranks locked up, that

If the cranks locked up, that shouldn’t cause the rear wheel to lock up as well.

[don simon fbpe]

No mudguards on this bike,

No mudguards on this bike, the severity of the stop would have ripped the tyre and broken the mudguard too. It was brutal. Good job I’m hard as nails! Cheers.

[don simon fbpe]

kil0ran wrote:

kil0ran wrote:

Did the cranks also lock?

I hadn’t thought of cranks locking. It’s possible, but I rode it immediately afterwards.  Pedalling stopped as it locked up.

Do we have experience of cranks locking up?

[kil0ran]

Did the cranks also lock?
Did the cranks also lock?

[Sriracha]

Do you have mudguards?
Do you have mudguards? Possibly something wedged between the tyre and rear mudguard?

[hawkinspeter]

Odd. Could it have been

Odd. Could it have been something like a stick getting between spokes and stays, though that would probably have made a bang. Otherwise, I’d be looking at chain and rear cassette, though whenever I’ve had a chain misbehave it’s not rideable until it’s freed.

Anyhow, glad it wasn’t worse and get well soon.

[ktache]

Hope you make a quickish

Hope you make a quickish recovery.

Your ride home sounded impressive.

How old is the freehub, were you pedalling or freewheeling at the time?

I’ve had a couple of newer Shimano ones go by becoming fixed gear intermittantly.

I managed to ride home both times, but had to remember to pedal constantly, but they never became permanently fixed gear, would frehub for a bit, then not.

I have also had cup, cones and bearing rip themselves to peices, and a long time ago had a rear spindle break, they all cause the wheel to lock, but there is never riding on.

 

[Author]

Replies