Carbon Fibre Road Bicycle /w Oxydrive

[oigoi]

I think if I was going to fit a kit to this bike I would use a frog battery that goes on to the rear of the seatpost (changing the seatpost for an aluminium one if it was carbon)

 

[Kudoscycles]

Decent bike - nice components ...

I think you can fit an Oxydrive onto a bike with carbon forks - as long as you engineer it properly. If you're not confident specifying, installing and if appropriate making to measure an appropriate anti-rotation system, spreading forces adequately and getting tightening torques etc. correct then another route would be a far easier option.

As far as the battery is concerned I think it was Kudos (may be wrong) had batteries popping off the frame when using bottle mount screws on a carbon bike. So it isn't the easiest to work with. BH have integrated their battery into the frame design on their carbon bike, avoiding this problem.

Guess another question is - if you had to drill the carbon frame or add further bracketing (which would no doubt scratch / damage the frame) to reinforce your battery mount would you be happy to do that ? It might make selling the bike on as a carbon bike a bit harder - unless it was sold as a conversion - as I think people would shy away from buying a regular carbon bike that had been modified like that. A one-way ticket, if you like. I drew the line at drilling even my Trek Ally frame, or doing any dremeling of dropouts. With moulded in washers and the like it would have looked awful if the mounting design was ever changed and holes exposed again. Modifying dropouts on a front fork if you have to isn't such a big deal as you can replace them (bit more expensive with a frame !) but still they're expensive things to mess about with.

In a way, the bike looks a bit too nice as it is to turn into an eBike. I still have pangs of guilt when I look at the mods I made to the Trek. A bit like selling a horse into farm work once its racing days are over . Maybe selling it on as a trainer to someone who'd use it as it is would be kinder ?



That Rose bike with carbon forks has a crank drive motor so carbon forks aren't going to be an issue. I think the point is the Oxydrive is a front hub motor so issue of fork strength comes into play on account of that.

Yes it was us who had the batteries pulling out of the downtube-the manufacturer had not appreciated the high loads on the battery mounts when the bike is subject to off road usage.
After the event I did question the validity of a carbon frame on an ebike.
With a sports bike if you can save 1.0kg off a bike weighing say 8kgs,the percentage saving is very high and if racing very critical but with the weight of the battery,motor and electrics on a 22 kg ebike the resultant percetage saving seems hardly worth the cost. Also the ally frames are getting lighter.
From my yacht racing days with carbon masts I do remember us constantly tightening fittings that had come loose with compression of the carbon fibre-similarly ebikes have a need for a lot of extra fittings not present on a sports bike and its the transition between carbon and steel or ally which seems to cause the problems.
I am not saying that a carbon ebike is not possible but I think it needs to be a ground up design considering the interaction of the fittings in the design of the frame,I doubt whether a bolt on kit would ever work successfully.
My advice,keep your lovely carbon sports bike intact and buy a sporty ebike,there some nice machines around now that keep the sports riding style with assistance.
KudosDave

 

[RobF]

Another point is a converted carbon frame ebike would be worthless - neither roadies nor ebikers would want to buy it.

 

[amigafan2003]

Another point is a converted carbon frame ebike would be worthless - neither roadies nor ebikers would want to buy it.

It's only worthless if you want to sell it.

If you intend to keep it or ride it into the ground it doesn't matter if it's worth £2k or 1p.

And I'm not sure ebikers wouldn't want it - I've sold two bikes I've converted that had carbon forks. Never tired one with an actual carbon frame though.

 

[Geebee]

If stressing the frames is a worry try a crank drive and a triangle frame bag for the batteries, the BB should have no issue with a 3-4 kg drive and a frame bag will spread the load with no high stress points on the frame.

 

[amigafan2003]

If stressing the frames is a worry try a crank drive

Endless-sphere.com • View topic - New Bafang Crank-drives

 

[RobF]

Looks like Storck make a full carbon ebike:

Storck Raddar - Storck Raddar Electric Bikes - Products - Pedelec - Carbon Multroad RADDAR Deore