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Discussion Starter · #1 ·
We just built up a new full suspension bike designed around the Rohloff SPEEDHUB. Oxide Cycles' new Battleaxe frame has a unique jackshaft chain routing that completely eliminates chain chatter. So far, it's ridden like a dream and we're really excited about the design.

Read all about the build and the inspiration behind it here: The Monkey Lab: Monkey Ride: Neil's Oxide Battleaxe All-Mountain Bike

Who else has Rohloff full suspension bikes to share? We'd love to see any other examples of the SPEEDHUB on full suspension bikes!

Bicycle tire Bicycle wheel Tire Bicycle wheel rim Bicycle frame


Bicycle tire Wheel Tire Bicycle wheel rim Bicycle wheel
 

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We just built up a new full suspension bike designed around the Rohloff SPEEDHUB. Oxide Cycles' new Battleaxe frame has a unique jackshaft chain routing that completely eliminates chain chatter. So far, it's ridden like a dream and we're really excited about the design.

Read all about the build and the inspiration behind it here: The Monkey Lab: Monkey Ride: Neil's Oxide Battleaxe All-Mountain Bike

Who else has Rohloff full suspension bikes to share? We'd love to see any other examples of the SPEEDHUB on full suspension bikes!

View attachment 877649

View attachment 877650
Cool setup. Are those freewheels on the jack shaft, or fixed?
 

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Thanks. Those are Surly fixed cogs on the jackshaft.
Yeah, I followed the link and read that, thanks.
I know it makes no difference for a freewheeling hub gear, I was just thinking outside that realm and considering how cool it would be to have a shift while coasting derailleur drive train with a fixed cassette. Any reason a freewheel could not be fitted?
 

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Discussion Starter · #5 ·
Yeah, I followed the link and read that, thanks.
I know it makes no difference for a freewheeling hub gear, I was just thinking outside that realm and considering how cool it would be to have a shift while coasting derailleur drive train with a fixed cassette. Any reason a freewheel could not be fitted?
Interesting idea. Yes, this is theoretically possible. Outside of changing the thread size on the jackshaft body to match the freewheel, there may be some clearance issues that would need to be sorted out due to the extra thickness of the freewheel.
 

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Interesting idea. Yes, this is theoretically possible. Outside of changing the thread size on the jackshaft body to match the freewheel, there may be some clearance issues that would need to be sorted out due to the extra thickness of the freewheel.
But I thought you would come back and say we already have that feature with our gearhubs. Haha.
 

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I love it! I'd love to see a lighter shorter travel (120mm) version of this bike. I currently ride a haro sonix converted with an ebb for chain tension duties. It's a less than ideal design. It works ok but it squats badly under acceleration or slow cadence steep climbs. I had high hopes but I don't think a hybrid of a urt and concentric pivot design is the answer to the dual suspension rohloff bike design. After looking at bikes like the Dean ace0.4 or Mitech epsilon and doing a lot of reading on suspension bike design I pretty much came to the same conclusion that a high forward pivot with an idler chain would be the best solution. My haro frame and shock is about 3kg. It'd be good to see if they could get the frame weight down into that range for a less aggressive trail bike design. It'd be cool to compare this design with something like the DMR Bolt.
 

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Discussion Starter · #9 ·
Also does it flex , or twist much at the bb? With only one tube welded to the bb I'd imagine this could be an issue.
We were aware of the possibility, but the bottom bracket has been totally stiff and has had no issues at all. It's been a dream bike so far!
 

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Discussion Starter · #11 ·

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Discussion Starter · #14 ·
Cyclemonkey, how do you feel about the added drag of a second chain? Deal killer?

I ask because I'm on a thing or two or three about the subject.
There is some added friction, but it's not really noticeable on the trail. The bearings and seals in the jackshaft sprockets are still being finalized, and the friction increases when they get dirty. The final arrangement will be more weather resistant and not be as susceptible. Small price to pay for the performance of the bike and lack of chain tensioner.
 

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There is some added friction, but it's not really noticeable on the trail. The bearings and seals in the jackshaft sprockets are still being finalized, and the friction increases when they get dirty. The final arrangement will be more weather resistant and not be as susceptible. Small price to pay for the performance of the bike and lack of chain tensioner.
Agreed on that last notion. Thanks so much for the feedback, I'm going to continue my project with increased confidence.
 

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We just built up a new full suspension bike designed around the Rohloff SPEEDHUB. Oxide Cycles' new Battleaxe frame has a unique jackshaft chain routing that completely eliminates chain chatter. So far, it's ridden like a dream and we're really excited about the design.

Read all about the build and the inspiration behind it here: The Monkey Lab: Monkey Ride: Neil's Oxide Battleaxe All-Mountain Bike

Who else has Rohloff full suspension bikes to share? We'd love to see any other examples of the SPEEDHUB on full suspension bikes!

View attachment 877649

View attachment 877650
Do my eyes deceive, or is that a ~15" BB height?

Also, do my eyes deceive, or are those some of the last ****-stompin' + ahead-of-their-time WTB Dissents alive in captivity?!

Cool bike.
 
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