2

Can anybody confirm Shimano RS100 wheel rear hubs have two ratchets inside the freehubs? It looks like there are sockets for 3 ratchets but there are only 2 ratchets. Since we bought the bike second hand, we don't know whether it has been serviced before.

What is the difference between having two or more ratchets in a freehub?

Improve this question
2
  • 2
    Is it a “standard” Shimano screw-on freehub module? It’s rare for anyone to open those up for servicing so it might be a manufacturing cost move to only use 2 of 3 available pawls.
    – Warren Burton
    Commented Dec 29, 2023 at 12:13
  • @WarrenBurton You can see the rear hub model here: bike.shimano.com/en-EU/product/component/tiagra-4700/…
    – Ender
    Commented Dec 30, 2023 at 10:55

2 Answers 2

Reset to default
3

Yes, seeing only 2 of the 3 slots occupied is normal and what you'll typically see when you open one. I have no idea why.

Improve this answer
0

When there are 3 sockets its is likely they all need to be there. Those tiny bits of metal are all that keeps your weight when standing on the pedals. It is better to divert that load over multiple parts, as the load per part gets smaller.

Improve this answer
1
  • Not so! One ratchet is carrying all of your load. These aren't components that would do load sharing. Minuscule differences in the clearances makes it impossible for load to be shared. This is similar to lockpicking, if you pick a lock, then there's only one pin that's binding and this is how single-pin picking works.
    – juhist
    Commented Feb 17 at 19:31

Not the answer you're looking for? Browse other questions tagged or ask your own question.