105 Front Derailleur wont fit

[Dogtrousers]

As a follow up to this last question lads the cranks on my new set up are 172.5 my old Claris / FSA were 175 do I need to adjust my saddle height proportionally for this

Which way would you adjust it? Down? (because at the bottom of the stroke the pedal is 2.5mm lower) or up? (because at the the top of the stroke it is 2.5mm higher).

Tbh I'd leave it where it is. Get settled in with the new stuff and revisit saddle height later if you find it necessary.

 

[Jimmy Welch]

Go

Which way would you adjust it? Down? (because at the bottom of the stroke the pedal is 2.5mm lower) or up? (because at the the top of the stroke it is 2.5mm higher).

Tbh I'd leave it where it is. Get settled in with the new stuff and revisit saddle height later if you find it necessary.

Good call

 

[Ming the Merciless]

Aluminium drinks can is the perfect shim material. No bodging involved. There was even a book about it.

Problem is the person who wrote the book was on Coke at the time. 😉

 

[Ming the Merciless]

105 shifters allow you to "feather" the front mech (something I've never got the hang of but I read about it in the manual). Would this still be effective (if you actually know how to use it) with the Claris mech?

What is this feathering nonsense? My bar end friction shifts are perfect each time.

 

[Jimmy Welch]

What is this feathering nonsense? My bar end friction shifts are perfect each time.

It was new to me , it seems you can micro shift the gears to allow rub free cross chaining ,

 

[Jimmy Welch]

Thanks everyone improvised shim made and fitted
View: https://youtu.be/VxT5s_m8j90?si=kYmPkSFv8VUANKmN

 

[Ajax Bay]

As a follow up to this last question lads the cranks on my new set up are 172.5 my old Claris / FSA were 175 do I need to adjust my saddle height proportionally for this

You should adjust your saddle up 2.5mm as the distance you wish to maintain is the position of the leg when the pedal is at 6 o'clock (which with the 172.5mm cranks will be 2.5mm higher (cf BB)). This assumes you had your saddle at the 'right' height with the FSA 175s.

 

[Jimmy Welch]

You should adjust your saddle up 2.5mm as the distance you wish to maintain is the position of the leg when the pedal is at 6 o'clock (which with the 172.5mm cranks will be 2.5mm higher (cf BB)). This assumes you had your saddle at the 'right' height with the FSA 175s.

Yes cheers original was bang on from a full bike fit a couple of years ago