Disc front hub on non-disc frame

[Multebear]

Inspired by this post I was considering building a front wheel with a hub dynamo for winter training. At the moment I'm riding with rim brakes. But since no one knows what the future holds, it's not ruled out that I will ride with discs in the future. So on order to be prepared for that, my question is: Would cause any problems to build a front wheel with a disc hub on a rimbrake rim and ride it with rim brakes for now. The spacing is the same and both are with QR's. And if I want to ride it with disc brake in the future, I'm just gonna mount a disc on the wheel/hub and ride it like that. Any thoughts?

I'm aware that thru axle probably will be the standard in the future. But let's not focus on that for now.

[joejack951]

No issue at all, unless you consider a slightly dished front wheel, slightly more weight, and, eventually, using a rim brake rim on a disc brake wheel in the future an issue. Seems like a reasonable idea to me if you plan to keep this wheel for a while.

[ergott]

I have a front wheel like that

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[Lelandjt]

I think your last paragraph is the hitch. There will be no point in doing this* because if you do eventually want to move the wheel to a disc frameset the axle won't match up. I mean, right now there's still some QR/disc forks but in 2 years?

*The only reason you should bother is if you find a dynamo hub with swappable end caps so it can be switched to thru-axle later. This is common on MTB hubs but I doubt a dynamo hub with swappable end caps exists.

[MikeMoore]

I do this. I run a QR disc dynamo hub on a non disc frame.

If you want to future proof, the SP PD8X comes with adaptors to run a 15QR in a 9mm QR frame.

https://thecycleclinic.co.uk/products/s ... dynamo-hub

[Multebear]

^Nice, that's what I'm looking for.

[Multebear]

So I was trying to find the right length spokes for this build. I'm using a Mavic A119 rim, and 32 spokes in 3x config. Does this look right?

293.2 left side and 294.7 right side?

[MikeMoore]

Looks correct to me. I'd go for 292 and 294, probably with Sapir DLights.

[ooo]

Why 32 spokes for "winter training" wheels? May be be 24-28 spokes?

[Multebear]

Thanks Mike Moore

ooo; 32h opens options for a wider selection of rims. Just about every rim on the market comes in 32h. Especially the cheapest and most durable ones like Mavic low end, Open Pro's, A119 e.g.

[ooo]

28 hole Mavic Open Pro Clincher Road Rim 2017 £39
https://www.sigmasport.co.uk/item/Mavic/Open-Pro-CD-Clincher-Rim/3IP0
http://www.chainreactioncycles.com/mavic-open-pro-clincher-road-rim-2017/rp-prod140748

[Multebear]

Nice ooo. Didn't know 28h open pro's were available.

I've just finished a wheelset with Shimano 105 hubs and Mavic A119 rims 32h/32h. I'd like the front wheel with dynamo to match that wheelset with the same rim. So if you find the Mavic A119 rim in 28h, I would be really interested.