New front derailleur

rubez

My front derailleur rubs slightly on my rear tyre, so I need a smaller one.

I have found this, and although it looks smaller and chubbier (the cage) but there is no reference point, and the pic is tilted to one side, so it may not be smaller!

Shimano FD-M360 Acera Front MTB Bike Derailleur


It is described as dual-pull. What is this? Will it work for a triple chainring?

Here is my old FD, don't actually know it's specific model number, but it is a Tourney - though there are a few different versions of that name.



Is the Acera definitely smaller?

And is it suitable for my bike?

cooldad

Dual pull - pull from top or bottom.

Otherwise no idea.

Parktools might help explain.

Chunkers1980

Is your tyre wonky?

felix.london

the mech is 'inboard' of the chainstay? très bizarre

cooldad

That's the crank you idiot.

felix.london

you what? If the front mech is touching the tyre then the mech must be protruding inboard of the chainstay.

felix.london

You have got the outer plate of the mech cage parallel with the chain ring haven't you? It doesn't just need 'straightening' does it?? If not - that sounds pretty weird to me

felix.london

just had a look on the gf's Apollo ( :? ) and indeed the FD does protrude past the chainstay when it's in the granny ring - If I put a 2" tyre on the back it would rub on the FD

rubez

Already have the tyres, I want to keep them.

If a stubbier derailleur can do the trick, that'd be better - and less expensive.

cooldad

felix.london wrote:

you what? If the front mech is touching the tyre then the mech must be protruding inboard of the chainstay.

I think you missed a few long, meandering, now locked threads.

rubez

Yawn, you are like a school girl following me around.

Do you actually have anything useful to contribute to the point?!

Here is a straight on view.

Is there any reason why the legnth sizes are different. Are better models generally shorter?

Chunkers1980

It's amusing.

Do you have a photo from above (below) of when it rubs on the tyre?

cooldad

Is it a triple?
Do you have a triple?
Agreed it's dual pull.
Is it the right clamp size (or comes with adapters?)

If yea to all of the above it should work.

But so should the existing mech.

rubez

Existing mech works, but is too lengthy (for the chunky tyres that are fitted)

I have a triple (3 chainrings) up front.

Clamp sizes? No clue about that, should fit as frame looks a standard size.

The reason for this new FD would be if the length of the cage is shorter - and therefore doesn't protude back towards the rear tyre as much.

BigAl

Available from Park Tools (check your Internet history for URL)

rubez

Wonder how much the price increased with that Parktools sticker added value

People have tried this before, and the side with no give messes with the chain, not that I was gonna try it.

Ordered the Acera FD.

Will see if it is smaller...

cooldad

Good thinking.

JBA

Go 1x7 (or 1x8 or 1x6, I'm losing track) and the FD, front shifter, a couple of chain rings and some heavy, pointless gear cable can be thrown away and your new BSO will be both lighter and more awesome.

ej2320

I'd go singlespeed if I was you, then you'll never have the front mech hanging off and rubbing your deformed rear tyre
Plus it will save the inevitable thread of indexing gears or your rear mech is rubbing along the ground....

BigAl

ej2320 wrote:

I'd go singlespeed if I was you, then you'll never have the front mech hanging off and rubbing your deformed rear tyre
Plus it will save the inevitable thread of indexing gears or your rear mech is rubbing along the ground....

Though we would still get the 'what are horizontal drop-outs and eccentric BBs' type questions

ej2320

We would get them, if Rubez actually owned a bike. Although we'll probably still get them anyway

BigAl

Oh Rubez certainly owns a bike.

Occasionally he just lets slip some piece of knowledge that betrays him.

The Rookie

Rubez is managing to bring whole new meanings to the word Frankenbike..........

raldat

So Rubez wants a derailleur with a shorter cage because the lower end protrudes to far and hits the tyre. Assuming he finds one standby for the "why does my chain rub on the derailleur when on the granny ring" thread.

Of course I would offer this as advice not a sarcastic comment but I doubt he would listen.

rubez

JBA wrote:

Go 1x7 (or 1x8 or 1x6, I'm losing track) and the FD, front shifter, a couple of chain rings and some heavy, pointless gear cable can be thrown away and your new BSO will be both lighter and more awesome.

Co-incidentally, I was reading about going derailleurless last night.

I heard some maverick on a YT vid say "the best front derailleur is no front derailleur, but if you must..." (proceeds to instruct on FD installation) Also read a thread asking if the FD was going out of fashion...

So, is it the middle ring that gets used up front? Does anyone do this?

I guess moderately steep hills would be out of the question... and what about going fast? Wouldn't your legs be going like the clappers?!

cooldad

Yes or any you want to put on and not if you are strong and maybe.

The Rookie

If you aren't changing gear at the front, why cart the other rings around, I have 3 bikes with no front dérailleur, one has a 46T, one a 36T and one a 32T, each to suite the intended usage.

rubez

My cassette is a 32T I think.

I would be using the other rings normally, but if there is no real need for them - and I can't get the FD working, due to rubbing off the rear tyre, or cause the chain is rubbing off it, then I could try out no front gears.

Wouldn't you still need the mech/guard in place though, so the chain stays on during bumps etc?

BigAl

rubez wrote:

Wouldn't you still need the mech/guard in place though, so the chain stays on during bumps etc?

Yes, but it won't impede the tyre as it'll be lined up over the middle chainring.

Or get a narrow/wide chainring and clutch mech.

I assume you don't have lock-on grips so we can look forward to a 'how do I get my grips off' thread

cooldad

Not really. Trying out a narrow wide ring and it was quite successful around Wales and local trails. Used with a standard (non clutch) mech.

cooldad

Or rather, my son was as he is fitter, stronger and slightly more hardcore than me.
I still love my granny.