Carbon Single Speed MTB frame?

Do they exist?

Currently using a tensioner to run a single speed setup and it’s a bit annoying. No space to use a bb mounted one either.

The only SS specific frames I can find are more relaxed geometry / more touring style, and heavy steel frames. I’d like a more XC style frame.

I can’t think of one. Someone once said that carbon doesn’t work well with SS because of more twisting forces when out of the saddle in the ‘wrong’ gear or something, no idea how accurate that is.

What tensioner are you using? I use Alfine ones with two jockey wheels on mine and they are brilliant, the single jockey wheels ones can be a pain.

For light ss-specific frames you are probably going to have to look at titanium

Not cheap

https://www.trekbikes.com/gb/en_GB/bikes/mountain-bikes/trail-mountain-bikes/stache/stache-c-frame-set/p/30187/

Much cheapness but looks like it’s lived a life, or three.

https://www.ebay.co.uk/itm/226431230622?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=UGz136-lQqu&sssrc=4429486&ssuid=WUD0UrAWSYG&var=&widget_ver=artemis&media=COPY

Looks a decent buy if you’re a medium.

https://www.ebay.co.uk/itm/305815613699?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=AHd95ORJT7q&sssrc=4429486&ssuid=WUD0UrAWSYG&var=&widget_ver=artemis&media=COPY

Spot Brand Rocker

Previous generation Pivot Les

Probably gonna need to look at older models. There was a few like Superfly, Stumpjumper, On One Lurcher

If you like the frame you’ve got (apart from its single speed ability) get a white industries eno hub or trickstuff bb?

Niner Air 9 isn’t carbon anymore but might still fit that need? Salsa Timberjack Ti?

I’m still riding* the old santa cruz highball al which might fit the bill if you can find one second hand. When I rode ss a lot more I lusted after the pivot les but that’s back to normal dropouts unless you can find an old one.

*well, it’s in the shed and not entirely rideable right now but that’s more down to a matter of spare time

Any carbon frame with a BB30 or PF30 BB can be run SS with a Wheels MFG EBB.

Wheels Manufacturing BB30 Eccentric Bottom Bracket 22/24 mm Black

I found a new old frame on EBay and built it up singlespeed. Weighs 18lbs. Gets ridden loads and makes a lot of sense. The only thing I’d change is the sliding dropouts as the brake calliper has to be aligned separately. Here’s a picture:

I realise it’s not carbon but a Sonder Broken Road would fit all your other criteria

Broken Road Ti Frame

Used to be a lot a singlespeeders talking of the Ibis Tranny.

Edit:  if you are just after a lighter-weight SS frame, looking to titanium will give you loads of options.

Edit 2: did anyone mention the Trek Stache?  Edit 3: oh, yea like three other people, sorry

Looks like Giant made a ss XTC, once upon a time at least

I’d be wary of any method of tensioning that doesn’t include something to physically block slippage, like a dropout tension bolt/set screw. Back in my peak singlespeed days I had several EBBs, they slipped, either a lot or gradually over time. Also rode with someone who had a Tranny, same issue. There’s nothing to stop those stays working forward except friction.

@mjsmke I have a Genesis IO ID (but singlespeeded) with 120mm Fox forks, size Large that I have not ridden this year and happy to sell.

PM if interested.

Never had my EBB slip on my old Stooge but then that had 2 biggish bolts holding it in place, screwed through the bottom of the bb shell.

Yea my Stooge EBB was problem free too, although I suspect carbon frames never have that design

Yep, same design as my old Singulars then. Tight fit, never creaked. Didn’t matter if it was rusty/almost seized, grip paste, bolts so tight the shell was starting to deform. Still moved. Had several bikes after that with Paragon/Kona sliding dropouts, problem solved.