Lesson learnt.

bluebarchetta

Okay, so I'm feeling rather embarrassed after a crash this morning.

I was bedding in some new pads on my discs - following the process of 20 quick stops from a reasonable speed on a quiet stretch of road.

I can only assume that I did not have quick release tight enough on the front. I'm normally paranoid about this have the QRs very tight, and I've change the standard ones to Ultegra as I am not keen in the external cams. Anyway without warning on the fourth stop the front wheel came off and I face planted.

A trip to A&E to be deal with the cuts, broken glasses, helmet, holed jersey, buckled wheel, damaged spokes, and various scratches on my GF01...

I still can't believe that the wheel came out of the dropouts quite easily on level ground.

Lessons learnt :roll:

Check the QRs each ride...

keezx

Never understood why the caliper is located behind the fork, a clear design failure.....
This fenomena of the "ejecting" front wheel was allready described by the first disc users (long distance riders).

homers_double

Yep, and that's why the sensible designs use a bolt through...

Bobbinogs

Same goes regarding caution about QRs for rim braking. On a club ride a few months ago about 10 minutes in, the route went down a road with a few speed bumps. Cue most chaps doing some gentle bunny hops over them...except one chap hadn't tightened the QRs properly and promptly dropped out the front wheel and face planted. Ambulance job, I'm afraid :-(

bluebarchetta

Yes, I realise I was 'lucky''

kingstonian

Ouch.

Heal quickly.

cycleclinic

Not a design flaw. the caliper needs to be behind the fork legs for aerodynamic reasons. MTB's solved this problem a while back with forward facing dropouts as when you brake the axle gets pushed back up into the dropout. Many disc brake forks still have vertical/rearward facing dropouts. Also disc brakes can loosen the Q/R so it essential they are done up tighter than you would on a rim brake bike. I do mine so tight my palm hurts on closing. There is also some evidence that suggest the Q/R on the left side resist loosening more than the Q/R closed on the right side.

Yes check the Q/R before you ride. Heal well and soon.

BrandonA

You went to hospital when you only had cuts and bruises? Unless you received lots of stitches this seems a waste of everyone's time, effort and money.

bluebarchetta

Yes stitches for a deep cut over my eye.

DanTe1977

BrandonA wrote:

You went to hospital when you only had cuts and bruises? Unless you received lots of stitches this seems a waste of everyone's time, effort and money.

Bloke comes off bike, quite obviously bangs his head - moron wastes 5 seconds of everybody who reads his paragraph of drivel's time.

I hope you don't ever come off your bike, if you ride one that is, decide not to get yourself checked out because you're well hard and there's actually something wrong.

briantrumpet

BrandonA wrote:

You went to hospital when you only had cuts and bruises? Unless you received lots of stitches this seems a waste of everyone's time, effort and money.

I've gone into A&E twice after what seemed fairly innocuous falls, and despite having just a slightly cracked radial head (no pain at all really) was I made to feel in the least that I'd wasted anyone's time.

Robert765

Ouch,I can only image the pain, wishing you quick recovery. And as you said indeed lesson learned!

de_sisti

At the cafe stop today I locked a club member's bike against mine with lock no 1.
Lock no 2 could fit round both frames, so I locked it through my front wheel/forks.
After tea and cake we were ready to set off. I unlocked club member's bike from mine,
and when the group was ready to set off I put my leg over the crossbar and was about
to clip in and set off when someone reminded me that there was a lock connected
to my front wheel. Lesson learnt; check bike before setting off.

sloppyschleckonds

Thank god you were ok and wearing a Helmet

bernithebiker

Aren't the 'lawyer tabs' there to stop this? Surely the wheel cannot fall out unless the QR is really quite loose, and in that case, wouldn't you notice the wheel was loose straight away?

bluebarchetta

There was no sign of play beforehand. I keep my bike hung up at with the wheels at eye level - I find this good for checking tyres for cuts, lubing the chain etc. It didn't notice it loose getting it down or when riding. It must have been tight enough to avoid this but not tight enough to resist the braking force of bedding the pads in.

The 'lawyers tab' aren't very big on the GF01 (certainly not compared with my Fox forks on MTB), but like you I'd assume I'd get a warning first.

Overall, my helmet and glasses worked - I am very glad the scratches and dents were on them not me...

keezx

bernithebiker wrote:

Aren't the 'lawyer tabs' there to stop this? Surely the wheel cannot fall out unless the QR is really quite loose, and in that case, wouldn't you notice the wheel was loose straight away?

They can stop this , but were invented for idiots who do not get the function of QR skewers and try to use them as a wingnut.

[email protected]

homers double wrote:

Yep, and that's why the sensible designs use a bolt through...

Like a screwthread maxle on mountain bikes ?

[email protected]

I remember doing a reasonably long rides in the hills, got a PB on a downhill and then on the uphill I heard a repetitive noise coming from somewhere, the problem with bikes is trying to diagnose where a squeak or rattle is coming from, I thought it was my new shoes and cleats as I was standing up out the saddle. A few days later I had the bike on a bike-stand and found the front skewer was loose, very very lose. Tightened it back up and the noise went.

andrewjoseph

thecycleclinic wrote:

Not a design flaw. the caliper needs to be behind the fork legs for aerodynamic reasons. MTB's solved this problem a while back with forward facing dropouts as when you brake the axle gets pushed back up into the dropout. ...

I don't think this is actually the case.

I think the only way the axle will get pushed/pulled back up into the dropout is if the calliper is on the leading edge of the fork.

the 'forward' facing dropout is only a few degrees off vertical and the forces are still trying to pull the axle out.

fenix

OP are you definitely tightening up the Qr properly? Not just tightening it by turning it? I have known people who do this rather than use the lever.