tomgdaly

I got a 30/44 teeth chainset to reduce the gearing on my roadbike for bikepacking and touring. However, I need some way to lower the front derailleur. I bought a GRX derailleur because of the longer reach but I’m still up to 8 mm short.

Is there a simple extender available (the bracket is riveted to carbon frame)?

The only option that I can find online is a Wickwerks ‘Fit Link Braze-on Adapter’. If that would work it would cost me 100 dollars approx. with shipping and import charges etc from US to Ireland. This would be ok if it would work and there is no other option.

Any advice appreciated.

dsbrantjr

You might be able to use a clamp-on adapter, if it will fit below the current mount, like this one: https://www.amazon.com/SRAM-Braze-On.../dp/B008H60OZA
SJS has a similar one and shipping to Ireland might be less: https://www.sjscycles.co.uk/gear-spa...ilver/?geoc=US

Litespud

something like this?
https://www.jensonusa.com/Problem-So...iABEgKRFvD_BwE

Litespud

Just remembered that you likely can't clamp things to the CF frame - here's a different design that might work:
https://www.ebay.com/itm/New-FSA-Bik...EAAOSwlGZfB839

tomgdaly

That's great thanks - (and yes, a band won't work on the carbon seatpost with 'teardrop' shape). I can get it much cheaper and FSA say it will do a 30-tooth inner - https://shop.fullspeedahead.com/en/a...ompact-adapter
Another potential snag is the 'tail' of the deraileur snagging the chain-stay; you get the usual accumulation of problems when you start to deviate from off-the-peg stuff. However, I think I'll be 'near enough'.

fietsbob

the other one

https://wickwerks.com/products/fit-link-adapter/





Option: Strip the parts off sell the frame/bike, get one with a round seat tube..





...

squirtdad

really off topic but checking the small world thing out..... you don't by any chance have a brother, reative Alan Daly in San Jose, rides a lot, plays guitar?

fietsbob

I have been using triple front derailleurs same one on an older cable over the BB frame

I could not use the same big chainring as I could on one with the cable running under the BB shell.

so you may have to get a different FD & that FSA thing.. or live with what you have

get a lower low with bigger cassette cogs..

tomgdaly

No connection

IanPritchard

I have exactly the same problem with a Chinese CF gravel frame I have bought and am building up with GX components. The derailleur sits too high for the 46/34 chainrings.

Options are:

1. a ready made adaptor/extension
2. have a local metal fabricator make a modified hanger
3. drill an additional lower mounting point to the seat tube using a "rivet nut"

3 would be quickest and cheapest (I have a rivet nut gun already) and have successfully fitting bottle bosses to an alloy frame, but am cautious about doing the same to CF.

I should add that the hanger can be removed with a hex key/wrench - it is not riveted to the frame.

Any thoughts?

Thanks

IanPritchard

I found an FSA Super Compact adapter. Could have got one delivered for AU$40 from Taiwan, but out of stock, so I've sourced one in the USA for a bit more. Looks like it will do the job.

I investigated drilling a new mount in the seat tube, but was reluctant to do do in a brand new frame still under warranty. It's doable with the right preparation of the rivet nut including aluprep and anodyne before applying epoxy and riveting it in place.

Can't believe there's not an easier solution to what must be a common issue, such as a standard bracket with a longer extension to it.