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Old 01-08-13, 02:42 PM   #1
agmetal
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New fenders for an old bike with 650A wheels?

I want to put modern fenders on one of my old bikes, which has 650a wheels. All of the options I've seen are for mountain bike 26" or 700c. Which would be the better option?
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Old 01-08-13, 02:58 PM   #2
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I reckon you should be able to fit ones intended for either size wheel. 650A is 590mm bead seat diameter, compared to the 559mm bead seat diameter of a standard 26" wheel. That's only 31mm difference in diameter, or 15.5mm difference in radius, as long as the 650A and 26" rims have the same width of tyre mounted on them. That's less than 3/4 " of difference, which is within the adjustment range of most mudguards with adjustable stays, so a decent set for a 26" wheel ought to fit yours. A set with fixed-length stays might not, depending how large your tyres are.
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Old 01-08-13, 04:17 PM   #3
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further, a 650a wheel likely has a much skinnier tire than a 26", so the OD of the tire+wheel is likely pretty similar. of course, 26" fenders tend to be really wide, and might look strange on a 650a x 28 or whatever.
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Old 01-08-13, 04:22 PM   #4
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What's the tire width?
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Old 01-08-13, 06:37 PM   #5
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Plastic fenders? Not much choice there. Metal fenders? There are 650b fenders which are for all intents and purposes interchangeable with 650a fenders. Aluminum fenders can be manipulated to get different radius curves. I've spread fenders for 559 (26" decimal) to fit 507 (24" decimal).
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Old 01-08-13, 06:40 PM   #6
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Plastic fenders? Not much choice there. Metal fenders? There are 650b fenders which are for all intents and purposes interchangeable with 650a fenders. Aluminum fenders can be manipulated to get different radius curves. I've spread fenders for 559 (26" decimal) to fit 507 (24" decimal).
+1 Honjo makes beautiful fenders for 650, IIRC so does Velo Orange.
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Old 01-08-13, 07:08 PM   #7
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What's the tire width?
37, I think. I don't want to spend a ton of money on this, and I'm looking for black fenders. Most of the metal ones I've seen are bare metal or chrome, and are also expensive...so I was thinking along the lines of SKS, Planet Bike, or similar.
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Old 01-08-13, 07:13 PM   #8
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I want to put modern fenders on one of my old bikes, which has 650a wheels. All of the options I've seen are for mountain bike 26" or 700c. Which would be the better option?
650A has a tire with a nominal 26" DIAMETER.
Same as MB's.
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Old 01-08-13, 07:19 PM   #9
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you might see if you can find a pair of the Blackburn 26" fenders to look at. I have the Blackburn 700x45's on my hybrid, and really like them. they have an aluminum liner, but are black plastic on the outside, and a nice stay adjustment system. they seem to run a bit narrow
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Old 01-08-13, 08:43 PM   #10
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650A x 37mm has an overall diameter of 664 mm, which is about the same as the dia. of 26 x 2.1" (666 mm).

As long as the 26" fenders aren't too wide for the frame and fork, I'd go with those.

Hybrid fenders are typically 45 mm wide and meant for 28-35 mm tires. These will probably work if the 26" fenders are too wide. They're meant for a larger diameter, but the fenders should be able to bend to fit.
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Old 01-09-13, 06:36 AM   #11
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Wald 89-26 lightweight chromed steel fenders are natively designed for 26x1 3/8 (a.k.a. ISO37x590mm a.k.a. EA3 a.k.a. 650A) wheels and tires. Your LBS can get 'em; they're widely available on the 'net.
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Old 01-09-13, 10:32 AM   #12
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phew, the Wald stuff I've seen has been rather poor quality. can't say I've seen those fenders though.
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Old 01-09-13, 11:26 AM   #13
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Both the blackburn and sks fenders I'm currently working with on a 26" build seem to be radiused slightly bigger than 559. Not a problem pulling them back in --but they might be just fine for 590. And I plan on using the blackburn now for a 650B (584) that looks like it will fit just fine.
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Old 01-09-13, 12:16 PM   #14
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I want to put modern fenders on one of my old bikes, which has 650a wheels. All of the options I've seen are for mountain bike 26" or 700c. Which would be the better option?
The 26" Planet Bike ones with adjustable rods for mounting should do fine for your A's which as said by others don't normally run really wide tires. They have a good bit of range of adjustment. Width wise, I use them for Schwalbe Marathon Plus tires at 26" x 1 3/4" (which is a tall and very robust tire, but not terribly wide) and it fits and looks good...visually sort of looks like a smaller 650B roll.

As always; putting off the shelf fenders on most any bike will require the do-er to spend some time sorting cats and tuning the mounts. Not atypical to need to bend a few things, go fetch a different length bolt, or get a Sheldon Bolt, etc., to get it all just right. For the adjustable rod mounts, you can end up with the rods sticking up out of the top quite a bit which I feel is unsightly, dangerous, and easy to get snagged on. After I sort the cats and have given it a trial run, I mark the length, tag them and then take them off to be cut to length and to coin the tops a bit with a file before assembling them for final use.

Hope that helps.
/Kerry
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Old 01-09-13, 12:39 PM   #15
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that bit about the rods sticking up is a big reason I like the blackburns. you have to cut the stays off to the approximate length required, and then they fit into a compression clamp for final adjustment, so there are no tips sticking up. I used the cutter in the base of a pair of full sized vice grips, this worked OK, but a a double-hinged mini-bolt cutter worked much better. or a dremel cutoff wheel.
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Old 01-09-13, 04:22 PM   #16
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phew, the Wald stuff I've seen has been rather poor quality. can't say I've seen those fenders though.
Gran Bois fenders, $189
Wald fenders, $18
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Old 01-09-13, 04:40 PM   #17
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Gran Bois fenders, $189
Wald fenders, $18
That seems a little high for Honjos. I thought they were running about $150, I seem to recall paying right about $100 for my set on sale.
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Old 01-09-13, 04:41 PM   #18
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Gran Bois fenders, $189
Wald fenders, $18
Blackburn fenders, $35
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Old 01-09-13, 10:05 PM   #19
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I like the look of those Blackburn ones, may have to see if I can find those locally.

@tcs: the Wald fenders are chrome. I want black.
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Old 01-10-13, 11:28 AM   #20
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Gran Bois fenders, $189
Wald fenders, $18
TCS; Recommend check www.amazon.com; and search on Brandname +Fenders such as "Planet Bike" +fenders. Or just see them all with search on Bike +Fenders. Last time I bought them (2011) they ran $29, but were on sell for $19.99/pair with free Prime Shipping. So I bought a half-dozen sets in 700C and 26". If they weren't on sale, I would have checked ebay and Nashbar. They mounted very well, look right, and have held up perfectly in my use (but I am not an extreme rider...).

//Kerry
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Old 01-10-13, 06:05 PM   #21
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TCS; Recommend check...
Actually, a comprehensive reading of this thread will show:
1) I'm not the OP. I don't need a set of fenders.
2) I was just informing the OP of another, inexpensive option for his self-described 'old' bike...which as it turned out, would have been unnecessary if the OP had been clear on all requirements.
3) I was confirming the quality on the Wald fenders might be sketchy - they're really cheap.
4) I actually don't set prices for Bicycle Quarterly's store, nor do I control any other retailer's overstocks, sales prices or sales timing.

No good deed goes unpunished on Bike Forums.
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