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Xtracycle on 700c hybrid/commuter type frame?

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Xtracycle on 700c hybrid/commuter type frame?

Old 12-05-12, 01:41 PM
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mc510
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Xtracycle on 700c hybrid/commuter type frame?

I'm really intrigued by the Nashbar Steel Commuter Bike, and the Windsor Kensington 8 .... traditional steel diamond frame, upright seating, and Shimano Nexus 8 internal hub. Think I can put an Xtracycle free radical on these? Main concern is whether the frame is strong enough for the extra weight and forces imposed by the Xtracycle. That is, would the frame actually be damaged by the forces (which I imagine are substantial), or would frame flex be excessive? Anyone have Xtracycle experience with this sort of frame?
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Old 12-05-12, 05:25 PM
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No personal ownership .. I think there is a 700c version.. V brake posts are located appropriate for that rim size..

If very concerned, instead, then , Buy a Big Dummy Built up and have a one piece rig..
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Old 12-05-12, 05:38 PM
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Fit isn't a major issue; even though they stopped making the 700c version, the 26" model will fit (but will need a brake-mount adapter). My concern is about the strength and stiffness of a frame that's made from "standard" size tubing, rather than the oversize tubing commonly used in mtn bikes.

For a variety of reasons the Big Dummy isn't a good fit for my needs.
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Old 12-05-12, 07:11 PM
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The frame is probably ok, the wheels not.
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Old 12-06-12, 04:27 PM
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Originally Posted by xoalaska View Post
The frame is probably ok, the wheels not.
+1. Try to find a 26" bike like a hardtail MTB or similar.
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Old 12-06-12, 10:17 PM
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Ah, I hadn't even thought of the wheels as being the weak link. You thinking that's because they can't take a wide enough tire to carry the weight, or because the rim/spokes are just not as strong as needed?
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Old 12-07-12, 08:38 AM
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Originally Posted by mc510 View Post
Ah, I hadn't even thought of the wheels as being the weak link. You thinking that's because they can't take a wide enough tire to carry the weight, or because the rim/spokes are just not as strong as needed?
Side forces on the wheels will be the killer unless you can source some 40 spoke touring wheels.

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Old 12-07-12, 01:21 PM
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Side forces on the wheels will be the killer unless you can source some 40 spoke touring wheels.
the use of an IGH gains a wider hub flange spread, to increase wheel strength. about twice as wide..
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Old 12-08-12, 06:51 PM
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You can build an Xtracycle on a 700c frame, but as other posters mentioned you need to buy an adapter from them that locates the V-brake bosses a little higher up to accommodate the larger diameter rim. The kicker is, as has been mentioned, a lot of 700c wheels are going to be fewer spokes and not quite as tough as what you'd get with a mtb donor frame. I think I've heard about some folks making an Xtracycle using a 29er frame which is bit better than a "commuter" bike. Really the best bike for an Xtracycle is going to be a non-suspension mountain bike, and wheels that are at least 36 spoke.
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