Hello - wondering if anyone can help.

I'm planning to cycle from John O'Groats to Landsend next month, and am trying to get my bike ready for it.
I've got a Langster & a tri bike. I think it's too hilly for the langster, so I had planned to use the tri bike with p-clips and a seat post clamp with the extra bit for panniers to attach to, but just tried to put it on, and found that the bit on the frame at the back that I thought I'd be able to clip it onto, is carbon.

Does anyone know if it's possible to move the gears from the tri bike onto the Langster?

I'm not sure how well I've explained it- my terminology isn't brilliant, but if anyone has any gems of wisdom, let me know!

Thanks

The first problem would be getting a derailleur hanger on the Langster. I've worked on some Peugeots which had semi-horizontal dropouts and a metal insert into the right dropout that acted as the hanger. Even if you could fabricate that, it's still a problem. Let's not mention rear wheel spacing. It just won't work.

I'd think your options are to rig the TT bike the best you can, or perhaps try something like the dinglecog on the langster.

You could even go freewheel and put two different sizes on it. That seems like a good compromise.

If you choose the Tri bike, you might want to find the biggest touring saddle bag you can and hope that will work.

If you're taking the Langster, I'd put a big freewheel on the other side of the hub for the hilly sections and retain a higher fixed ratio for the flats.

You COULD replace the rear hub for one that is internally geared. It may cost you $200 for the hub and relacing the wheel, but you would get a 7 or 9 speed bike out of the deal. 3 speed internally geared hubs cost quite a bit less. You would also need a shifter and I'm not too sure about how that works with an IGH. The cool side is that you can shift when stopped (not that this will be important in a race). There are some guys in the commuter forum who have done this with a Bianchi San Jose.

^^^^
+1 An internal gear hub on the Langster is the way to go

you can't cold set the spacing on the alu langster, so a standard road wheel won't fit in the track ends. an IGH or dingle with a tensioner might be your best options.

8 speed nexus on a 700 wheel, checkout veloorange.com they have them.

https://www.bikeforums.net/singlespeed-fixed-gear/242860-track-end-derailleur-hanger.html
Track end derailleur

from another thread. alfine internal.

^Ha, that bike has pretty much been turned into a '29er.

^Ha, that bike has pretty much been turned into a Trek Soho

As you've heard 8-speed internal hub would be your best bet. But would require at the least a new hub and spokes.

That would fun to have a wheel set with this on it. Ride fixed when you want, and this way too. Have to figure out a way to tie the cable off though...

That's a pretty sweet looking MTB.

lolz

8 gears on a Langster = 8 more reasons to hate.