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