baron von greenback
Retro Guru
How do you work out what size front derailleur you need do you just measure round the down tube and that's it or is it more complicated than that cheers
Front derailleur
- Thread starter baron von greenback
- Start date
bikeworkshop
Old School Grand Master
A few details:
Tube dia: 28.6 (classic) 31.8 34.9
Large ring size: Mtn- 42 to 48 Road 52
Double, triple
Cable pull - top or bottom
Cable pull ratio, road, Mtn,
Cable pull compatibility 789, 10, 11.
I'm sure there's more
In around 2010, shimano web ordering offered 140 varieties...
It's dropping back now with the rise of 1x and the decline of triple.
Tube dia: 28.6 (classic) 31.8 34.9
Large ring size: Mtn- 42 to 48 Road 52
Double, triple
Cable pull - top or bottom
Cable pull ratio, road, Mtn,
Cable pull compatibility 789, 10, 11.
I'm sure there's more
In around 2010, shimano web ordering offered 140 varieties...
It's dropping back now with the rise of 1x and the decline of triple.
I think the only details you missed were:
High or low band (I believe it may be referred to as top or bottom swing).
You also have direct mount variations and e-type.
I think I've also seen side pull as well, whatever that is.
I've seen talk and markings on front mechs relating to seat tube angle but I've never had an issue.
It was simpler back in the day, I'm sure front mechs will make a comeback, after all, it's an extra component to sell, as are chain rings.
High or low band (I believe it may be referred to as top or bottom swing).
You also have direct mount variations and e-type.
I think I've also seen side pull as well, whatever that is.
I've seen talk and markings on front mechs relating to seat tube angle but I've never had an issue.
It was simpler back in the day, I'm sure front mechs will make a comeback, after all, it's an extra component to sell, as are chain rings.
baron von greenback
Retro Guru
It's for a Marin Indian fire trail triple crank top pull I want a xtrm900
bikeworkshop
Old School Grand Master
IFT aluminium - i think in 93 it was 34.9 seat tube, but dropped to 31.8 some time later iirc.
If that's the size,
it's "m900, 34.9, top pull"
Ideally you'd measure with verniers, but you can calculate the circumference by wrapping a piece of paper round and marking it, measure, and divide by Pi.
The seat clamp is usually the same size, and often has diameter stamped into the underside, worth a look.
If that's the size,
it's "m900, 34.9, top pull"
Ideally you'd measure with verniers, but you can calculate the circumference by wrapping a piece of paper round and marking it, measure, and divide by Pi.
The seat clamp is usually the same size, and often has diameter stamped into the underside, worth a look.
