Rear axle damage with with shift kit?

[a/c man]

Has anyone else bent or broken your rear axle with the SBP shift kit?
I know I'm not as gentle as I should be, but so far I've bent one standard axle, and snapped one QR (quick release) rear axle in the last 300 miles or so.
Just got my new cromoly axle in the mail the other day. Lets see how this one holds up. I don't like high speed death wobble.

 

[give me vtec]

Has anyone else bent or broken your rear axle with the SBP shift kit?
I know I'm not as gentle as I should be, but so far I've bent one standard axle, and snapped one QR (quick release) rear axle in the last 300 miles or so.
Just got my new cromoly axle in the mail the other day. Lets see how this one holds up. I don't like high speed death wobble.

nuvinci hub... that's all I need to say.

 

[Pablo]

I happens. That's why we write:

5. have a chromoly or quick release rear axle, standard steel axles will bend

On our Requirements Page

Quick releases will work if they are HD. I'm two years plus into my QR and it's still perfect, and I slam shift.

 

[a/c man]

I don't know if the quick release axle was heavy duty or not, it seemed to be cromoly.
I do know that the skewer stayed intact long enough for me to limp my bike home.
I try not to shift hard but the fact is that shifting gears is so much fun sometimes I can't help but to get carried away. Anyone out there who is still riding without one is missing out on a pi$$ pot of fun.

 

[Fabian]

Hi Paul

I think part of the problem is variation in quality of materials used on different mountain bikes.

So far i've travelled 2900 kilometers (1812 miles) on my bike, equipped with basic Quando hubs.
I am very surprised at how well the standard rear wheel assembly has lasted - was expecting the free-hub and ratchet pawls to get blown to pieces from the torque of the SickBikeParts Shift Kit.
The rear hub has given perfect reliability, even with the extra weight my loaded trailer places on the drive train.

Shock loading could also be another factor, where the rider shuts off the throttle and slams it back open again allowing a sudden rise in engine revs before the slack in the drive system is taken up with a harsh transfer of torque.
Somewhere along the line, the weakest link is going to take the most punishment and if low grade materials are used, mechanical failure is to be expected.

Fabian

 

[Hawaii_Ed]

No issues on mine, I have quality rims though, I also shift hard!

 

[Nitropeewee]

Ive got mine on a shimono inter 7 (not sure what the axle is made of) no problems fer me. Im also pretty hard on it, pull a trailer with 110 mig welder n all my gear about 100 er so extra lbs. Only thing ive had trouble with are the sprockets on the jack shaft come loose after a hard ride. N yes i used locktite. think mabey i didnt get the shaft square with the mounting plates.

 

[Pablo]

Nitro - did you file flats on the shaft? That's the best trick, IMHO.

 

[Nitropeewee]

Yeah did that too. Mabey just not enough. Havent really messed with it too much here lately, weve been gettin snow bout every other day here in se ohio. Spring is right around the corner though.

 

[james65]

Broken axels

I have not had the problem but would like to know where are they braking. I am wondering wher they brake? middle, center, clusterside?