fossyant
Ride It Like You Stole It!
- Location
- South Manchester
Wych Bearings - I use them all the time.
Synapse Freehub issue
- Thread starter fraz101
- Start date
Page may contain affiliate links. Please see terms for details.
Cycleops
Legendary Member
- Location
- Accra, Ghana
More likely the pawls are worn or broken given the noise you say it's making. As I said you won't know until you have it apart.
Cycleops
Legendary Member
- Location
- Accra, Ghana
Here's a video of RJ servicing a freehub body. You might find it useful:
View: https://youtu.be/X9gIEG1db0s
View: https://youtu.be/X9gIEG1db0s
Looks like there are flat points on the axle, I'd expect that an adustable wrench on the rotor side and a cone spanner on the freehub body side should do it. Cone spanners are quite thin - about 2mm you may have a set if you have ever taken a regular cup & cone hub apart for servicing.
They look something like this.
They look something like this.
Just to add, keep in mind it may well be reverse threaded on the drive side.
The bearing may have got a bit stuck on the axle, chances are it needs a little tap with something to free it up.
Normally the freehub should be held in place with the axle end caps, certainly this is the case with most hubs I've seen. The other alternative, which tends to be the case on older designs is that the axle sleeve may be removeable and then the freehub body is loosened by using an allen bolt and turning to loosen it. However I can't see any obvious signs of an allen fitting, so my guess would be the friction fit needs a little encouragement to let it be removed.
Normally the freehub should be held in place with the axle end caps, certainly this is the case with most hubs I've seen. The other alternative, which tends to be the case on older designs is that the axle sleeve may be removeable and then the freehub body is loosened by using an allen bolt and turning to loosen it. However I can't see any obvious signs of an allen fitting, so my guess would be the friction fit needs a little encouragement to let it be removed.
T4tomo
Legendary Member
I can see the end of friendship coming on here.
"what do you mean you didn't know what the hell you were doing and just asked random people on the internet?"
Cycleops
Legendary Member
- Location
- Accra, Ghana
Maybe time to check out those wheel building videos on YouTube 
and suitable hubs.
Just try putting a pipe wrench on the freehub as it may just screw on.
Edit. I think I see the way. If you look you can see see two cutouts diametrically opposed to each other. This will need a special tool but there’s a vi on YouTube by RJ who made one from a 21mm socket.
View: https://youtu.be/1qBk5pePGRg
and suitable hubs.Just try putting a pipe wrench on the freehub as it may just screw on.
Edit. I think I see the way. If you look you can see see two cutouts diametrically opposed to each other. This will need a special tool but there’s a vi on YouTube by RJ who made one from a 21mm socket.
View: https://youtu.be/1qBk5pePGRg
Last edited:
OP
OP
fraz101
Senior Member
It’s all good ( he is my next door neighbour) 🚴🤣I can see the end of friendship coming on here.
"what do you mean you didn't know what the hell you were doing and just asked random people on the internet?"
Maybe time to check out those wheel building videos on YouTube
Just try putting a pipe wrench on the freehub as it may just screw on.
Edit. I think I see the way. If you look you can see see two cutouts diametrically opposed to each other. This will need a special tool but there’s a vi on YouTube by RJ who made one from a 21mm socket.
View: https://youtu.be/1qBk5pePGRg
Good spot, this may well be the solution.
