T
toolguy
Guest
Hi all,
I bought a new set of CrossMax SL wheels for my Santa Cruz last July.
They've had a few months worth of riding and then hung up for the
winter. I took the bike down a few weeks ago for it's first spring
ride and the rear wheel had seized. With a little effort (pedaling)
the wheel loosened up but I knew I had a bearing problem. I was set
for a ride so I did it anyway as it was a road ride in the mountains.
The wheel seemed OK but then on the descents at higher speed (about
+50 km/hr) the hub made this high pitched death scream that made me
think the wheel was going to explode. When this happened it felt like
I was hitting the brakes hard. I thought it was the bearing but if I
pedalled the noise and friction would stop. Scary.
I am a mechanic from my younger days but I have never pulled apart the
Mavic hub and didn't know the process or if I needed special tools.
So I took the wheel into my favorite mechanic. I told him the story
and together we pulled it apart. We inspected the freehub first.
Very simple really and it looked perfect. He lubed it a bit and we
moved on. We pulled out the left bearing (non-drive side) and it was
toast. Mavic used a one-sided sealed bearing and water had gotten
past it's defences. The bearing was full of **** and rust. He didn't
have the right size replacement so he rebuilt it as best as possible
and I wrote down the numbers and ordered a new one. The new one is a
double sided SKF. After that came in, I installed it. Everything
should be good now, right? Wrong!
On a ride on Saturday it was fine. On Sunday's ride it was screaming
it's death wale everytime I stopped pedalling! By the end of the ride
it was making this noise along with the associated friction at speed's
as low as 10 km/hr. I pulled the hub apart last night to have another
look at the freehub. I looks fine. There is nothing to indicate a
problem. The palls look like they may have some wear on the ends but
this may be my memory failing. I cleaned them and removed a little
grease as they seemed a little gummy. I put the whole unit back
together very confused as to what is causing this problem. I went for
a short test spin down the road afterwards and I have no noise up to
30 km/hr. I don't trust that the problem is fixed though. Any ideas
on what is causing this problem?
TIA,
Neil
I bought a new set of CrossMax SL wheels for my Santa Cruz last July.
They've had a few months worth of riding and then hung up for the
winter. I took the bike down a few weeks ago for it's first spring
ride and the rear wheel had seized. With a little effort (pedaling)
the wheel loosened up but I knew I had a bearing problem. I was set
for a ride so I did it anyway as it was a road ride in the mountains.
The wheel seemed OK but then on the descents at higher speed (about
+50 km/hr) the hub made this high pitched death scream that made me
think the wheel was going to explode. When this happened it felt like
I was hitting the brakes hard. I thought it was the bearing but if I
pedalled the noise and friction would stop. Scary.
I am a mechanic from my younger days but I have never pulled apart the
Mavic hub and didn't know the process or if I needed special tools.
So I took the wheel into my favorite mechanic. I told him the story
and together we pulled it apart. We inspected the freehub first.
Very simple really and it looked perfect. He lubed it a bit and we
moved on. We pulled out the left bearing (non-drive side) and it was
toast. Mavic used a one-sided sealed bearing and water had gotten
past it's defences. The bearing was full of **** and rust. He didn't
have the right size replacement so he rebuilt it as best as possible
and I wrote down the numbers and ordered a new one. The new one is a
double sided SKF. After that came in, I installed it. Everything
should be good now, right? Wrong!
On a ride on Saturday it was fine. On Sunday's ride it was screaming
it's death wale everytime I stopped pedalling! By the end of the ride
it was making this noise along with the associated friction at speed's
as low as 10 km/hr. I pulled the hub apart last night to have another
look at the freehub. I looks fine. There is nothing to indicate a
problem. The palls look like they may have some wear on the ends but
this may be my memory failing. I cleaned them and removed a little
grease as they seemed a little gummy. I put the whole unit back
together very confused as to what is causing this problem. I went for
a short test spin down the road afterwards and I have no noise up to
30 km/hr. I don't trust that the problem is fixed though. Any ideas
on what is causing this problem?
TIA,
Neil