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Old 10-22-06, 06:32 AM   #1
late
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What are some nice light hubs for a 650b wheelset?

Hi,
my wife, who is 5' 2" and 110 pounds is getting a Rivendell Bleriot for Xmas.
It's a 650b bike, I figure I'll put Velocity rims on it. I have a set of Ultegra hubs
I would like to use on it, but apparently they are the wrong size. She doesn't
need a typical Mtn bike hub, we only ride on the road and she is easy on her gear.
And... I would like to build the bike up as light as I can. I can't afford something super fancy, but I can stretch the budget a little. If it matters, the bike will prob
be 9 speed, but that is not written in stone. I have a spare left hand Ultegra shifter I might put on it. Being so small I may need to get her those brifters Shimano
makes for small hands.

Thanks.
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Old 10-22-06, 06:39 AM   #2
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Nice hubs for 650b are the same as nice hubs for 700c wheels. Weight doesn't vary much among Shimano's hubs, and hub rotating weight is a relatively minor concern compared to tires and rim. You need to worry about rear dropout spacing (135mm on MTB and 130mm on road) and I'm quite sure the Bleriot is 130mm spacing. So use your Ultegra (road) hubs. They're very good hubs.
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Old 10-22-06, 07:03 AM   #3
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According to the Rivendell brochure, rear hub spacing is 135. Like you, I was expecting it to be 130, if you want, you can see the spec. There is a link to it
right here...


Rivendell Bleriot Frame Opinions
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Old 10-22-06, 07:48 AM   #4
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Why not just pick up a longer axle (if necessary) and stick a 5mm spacer on the left side of your Ultegra hub?

650b?
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Old 10-22-06, 08:51 AM   #5
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Quote:
Originally Posted by Retro Grouch
Why not just pick up a longer axle (if necessary) and stick a 5mm spacer on the left side of your Ultegra hub?

650b?
Hi,
a year and half ago a mechanic said the wheels on my bike were dying. Since then
I have gotten two seasons of riding in, but I am going to replace them by the start
of next year. I got those hubs and some Ambrosio rims waiting in the cellar.

If it it was a perfect fit, I would have built up the wheels with the hubs, mounted them and made it part of the Xmas present as surprise. But since I have to buy hubs anyway, I might as well get them in the right size.

Also, I am a bit of a klutz, and I can easily imagine losing the spacer trying to
fix a flat on the road.

I am just hoping I can find some hubs almost as light as the Ultegras without
breaking the bank.
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Old 10-22-06, 09:12 AM   #6
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Quote:
Originally Posted by late
Also, I am a bit of a klutz, and I can easily imagine losing the spacer trying to
fix a flat on the road.

I am just hoping I can find some hubs almost as light as the Ultegras without
breaking the bank.
Uh - the spacer goes under the locknut so there's no chance of losing it while fixing a flat.
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Old 10-22-06, 09:43 AM   #7
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Quote:
Originally Posted by Retro Grouch
Uh - the spacer goes under the locknut so there's no chance of losing it while fixing a flat.
Huh,
I didn't know that. Good to know I have that as an option.
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Old 10-22-06, 09:48 AM   #8
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Okay, my bad on the Bleriot's rear spacing.
Again, the spacing matters but not the rim (650b, 700c, etc) diameter, in your choosing a hub.
Weight doesn't matter that much for hubs and honestly doesn't vary that much between most Shimano hubs. I'd recommend you go with Deore or LX hubs if you want to get new ones; if you want to just use your Ultegra hubs you can get a 5mm spacer to go on the non-drive-side axle (and it goes between the cone and the locknut, along with the washer that's already there). You may need to get a longer axle if you do this, but you don't need much axle showing through beyond the locknuts to seat the wheel in the frame's dropouts. The quick-release is what really clamps the hub into the frame, after which point the axle becomes largely incidental. And the Bleriot has vertical rear dropouts too.
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Old 10-22-06, 10:57 AM   #9
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Here's a 32-hole XTR rear hub (135mm of course) for $60, which isn't too outrageous considering it's got a titanium axle and a titanium freehub body. If you get one, back the bearings off a bit since the Ti axle compresses when the QR is fastened. You want to get it so the play just vanishes when the QR is fastened.

For a 110-pound rider, you might as well go with the lightest spokes you can get for a reasonable price. If you can't quite afford the DT Revolutions, then the DT 15-16ga Competitions are good.
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Old 10-22-06, 11:13 AM   #10
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Quote:
And... I would like to build the bike up as light as I can. I
And hubs is not the place to be doing this. Building a light bike isn't simply swapping in one component that's 50g lighter than the other. It's about spending lots of money everywhere for next to no gain in performance.
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Old 10-22-06, 12:10 PM   #11
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I have two wheelsets built up with NOS XTR hubs and Velocity rims. Both are very nice. I have found XTR hubsets at reasonable prices on eBay and elsewhere online.
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Old 10-23-06, 11:33 AM   #12
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Quote:
Originally Posted by mechBgon
Here's a 32-hole XTR rear hub (135mm of course) for $60, which isn't too outrageous considering it's got a titanium axle and a titanium freehub body. If you get one, back the bearings off a bit since the Ti axle compresses when the QR is fastened. You want to get it so the play just vanishes when the QR is fastened.

For a 110-pound rider, you might as well go with the lightest spokes you can get for a reasonable price. If you can't quite afford the DT Revolutions, then the DT 15-16ga Competitions are good.
Hi,
I just ordered Bikeman's last 950 hub. Great deal, thanks. The price of spokes
isn't an issue but durability is. We tour, and occasionally a pedal will get between
the spokes on the bike carrier. I'll ask my LBS what they think, but I know they usually use 14-15 ga.

Now I have to find a front hub
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Old 10-23-06, 02:58 PM   #13
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The front hub from your Ultegra set should work.

If you don't want to do that, Nashbar has NOS Ultegra front hubs from the last generation (i.e. "9 speed") Ultegra kit on special for like $19 right now, though only in certain drillings. If you can deal with the spoke counts that's a really good price IMHO.
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Old 10-23-06, 03:00 PM   #14
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what's NOS?
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Old 10-23-06, 03:52 PM   #15
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New Old Stock.

I.E. something that is new in the sense that it hasn't ever been sold or used, but isn't the current version of the product (it's "old" stock.)

To us budget-concious gearheads, it basically means a great steal on really good parts!
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Old 10-23-06, 03:58 PM   #16
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Cool. Thanks!
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