Cycling UK Forum

Having just got the lockring tool from my lbs I've cleaned the whole drive train...

When I took the sprockets off the freehub I noticed this:


Is that level of notching normal after ~600 miles?

I should note that it is a capreo style cassette, so the smallest few sprockets link back to the end sprocket on the splines, so I'd expect more wear at the end than the middle, but this seems excessive to me.

Have a look at this forum http://www.google.co.uk/imgres?imgurl=h ... hQfoxJGiDg seems to affect alloy freehubs the most.

Link is suggesting I'm putting too much torque through it... I don't think I'm anywhere near that powerful - the smallest sprocket up front has seen very limited use (and that's where max torque would be produced)
I can't see why you'd built the freehub out of a softer material than the sprockets, it just doesn't make sense to me...

There isn't much play in the sprockets when they are fitted (just enough to fit them), and I don't recall there being anywhere like enough room to fit a shim in there either.
Anyone else done that to an ICE freewheel, or do I send them the pics and see what they say (Generally they say nice things to me when I talk to them, but they would - I've spent quite alot with them recently...)

Bob

I'm not familier with the Capreo Freehub so if I'm talking daft forgive me.
The sprokets/cassettes on all other Shimano F/hubs are riveted together unless a cassette is split and rebuilt using individual sprockets, in which case I replace the rivets to hold the cassette together as one unit to prevent notching such as is shown in the photo above.

This is the ICE freehub, which is (I believe) a copy of the ?discontinued? capreo.

The sockets and spacers were all separate, which makes for easier cleaning. To get down to a 9 tooth high gear (smaller than the splines) the highest few sprockets key into each other, which puts the load from any of those onto the end 2? sockets on the splines. But that's still not amplifying torque.

I'm guessing that some level of damage is to be expected, but is this excessive?

Yes, whatever system of sprockets you use shouldn't produce damage like that. I appears that your sprockets aren't a good fit to the splines. I reckon your freehub unit is fit only for scrap. Sorry.

I have a couple of Campag rear hubs, both of which have done well in excess of 7,000 miles each, and neither has any damage at all.

Mick F wrote:Yes, whatever system of sprockets you use shouldn't produce damage like that. I appears that your sprockets aren't a good fit to the splines. I reckon your freehub unit is fit only for scrap. Sorry.

I have a couple of Campag rear hubs, both of which have done well in excess of 7,000 miles each, and neither has any damage at all.

That's the response I was looking for - direct comparison with other hubs. It's concerning, but I shall see what the nice men at ICE have to say about that. 600 miles isn't very far in my book...

Anyone else taken their ice cassette off recently?

[XAP]Bob wrote:.
I'm guessing that some level of damage is to be expected, but is this excessive?

IMO yes but not toally unexpected if the sprockets are fitted individually on an alloy carrier and not riveted together some how.
If you could get a steel freehub wear like that would be kept to a minimum or if you have to use an alloy f/hub you could drill and rivet the sprockets together but thats getting into engineering though not that hard to do if you have access to a pillar drill.

Mine are all separate cogs with spacers on an alloy unit.

I repeat:
no damage at all.

Mick F wrote:Mine are all separate cogs with spacers on an alloy unit.

Thats the first time you've mentioned that
.

I repeat:
no damage at all.

see above!

If the sprockets are separate then they should at least fit together and spread the load over the freehub.

When people put singlespeed cogs and spacers on a freehub they often find it bites into the freehub, so a wider cog is the answer.

Mine are 10sp now of course on my Chorus hub, but this photo is of my Mirage hub - spare wheels - and has been used for 7,600miles as 9sp and a a couple of hundred as 10sp too.

The Mirage 9sp cassette is all separate, but the Centaur 10sp has the biggest two sprockets combined. However, look at the photo after 7,600 miles with separate cogs.

Mick F wrote:The Mirage 9sp cassette is all separate, but the Centaur 10sp has the biggest two sprockets combined. However, look at the photo after 7,600 miles with separate cogs

The cogs are separate, but they fit together so that if you were holding them all together in your hand and turn one of the cogs the whole lot would turn as well. I imagine some cheaper cassettes don't do that.

No.
All completely separate and flat bits of steel. The spacers are flat plastic washers, nothing interlocks at all.

Just sussed the problem!

On my cassettes - all or most - of the cogs are separate flat discs, so are the spacers.

However, when you tighten the lockring, the whole lot is sandwiched tightly together to form one solid mass. This solid mass spreads the load on the splines evenly.

Perhaps Bob's lockring wasn't tight enough and his sprockets were slightly lose.