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Discussion Starter · #1 ·
I have a velomax sagitta wheelset on my cross bike that has been bomber for me. I have thrashed it beyond what any wheelset should have to take and I have only had turned a nipple once. It has disc mounts on it and I was wanting to put it on my 29er. The only problem that I really see is that the rims are 19mms wide and my normal 29er wheels are 23mm. Is this going to be an issue if I want to mount my "2.3" exi's on them?
 

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Many here are running rims that narrow. With Exi's (no personal experience), it has been suggested that you will need to run higher pressure to keep them from rolling off the rim. Also, the tire profile will not be as wide, vs using a 25mm rim.

The only thing you also may want to consider is the axle spacing. Is that wheelset 130mm or 135mm?
 

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I am not sure what the specs are on your wheelset, but I would look at the hub spacing. if 130mm you would need to do some customization, or just be willing to crimp your frame 5 mm narrower. (on steel frames not such a big deal, but not optimal no matter what material obviously)

Other than that, I have found from running open pro rims in the past that the tires work fine, but that the narrow rim made the ride more harsh because of less air volume for the same pressure as a wider rim. Incidentally, I had to keep about 40lbs of pressure at least in the same tire to prevent pinch-flatting, I only had to run about 30-32lbs to avoid it on the Salsa Delgado X.

If you go for it let us know how it works in the long term.
 

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I will be trying out 19mm rims (CXP21) soon aswell. Not by choice, just what I have lying around until I decide on what proper 29er wheelset to go with.

The difference is between 23mm and 19mm is 4mm, so that would make it just 2mm on each side of the rim. Seems like it would okay, but I will found out.
 

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SS4life said:
I have a velomax sagitta wheelset on my cross bike that has been bomber for me. I have thrashed it beyond what any wheelset should have to take and I have only had turned a nipple once. It has disc mounts on it and I was wanting to put it on my 29er. The only problem that I really see is that the rims are 19mms wide and my normal 29er wheels are 23mm. Is this going to be an issue if I want to mount my "2.3" exi's on them?
All depends on what hub you have. There are very few disc 130mm hubs (I can only think of one, but it's manufacturer escapes me at the moment) out there. Rim width won't be a problem, as long as you run enough pressure to keep the tire from nerdling over in corners.

MC
 

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Discussion Starter · #7 ·
shiggy said:
What bike are you riding now? Did you give up on the 1fg?
Shiggy, the 1fg gave up on me not the other way around. I have an SE racing BM Flier that I am really enjoying. The hubs fit fine in the frame too.
 

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mikesee said:
All depends on what hub you have. There are very few disc 130mm hubs (I can only think of one, but it's manufacturer escapes me at the moment) out there...
I know Velomax makes the Sagita disc set in 130mm rear axle.


2004 Velomax Sagita cyclocross wheelset features 130mm rear spacing, 28 hole front and rear, conventional j-bend spokes, and machined braking surface. Use Disc brakes or calipers. Quick Release Skewers included. Black.
Weight: 1932 grams per set (not including QR).
 

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SS4life said:
Shiggy, the 1fg gave up on me not the other way around. I have an SE racing BM Flier that I am really enjoying. The hubs fit fine in the frame too.
Sorry about the 'dale.

Cool on the Flier!

Go ahead and try the Exis on your wheels. Take a good high volume pump with you on rides for a while until you find the right pressure for you. I like to keep blending air until I can feel the tire squirm/fold in the corners then add a few pounds. Then adjust up if needed for pinch protection.

I have run 26x2.6 tires on 19mm rims at 16-18psi at Waldo.
 

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...as long as you run enough pressure to keep the tire from nerdling over in corners...
So, tell me Mike, is "nerdling" a technical term? :D LOL! ;)

You nearly had me RTFLMAO with that one.

Cheers!
-Ian
 

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road hoops for niners

I've had great luck using road rims and wheels on 29ers. Shimano hubs are still cone and race instead of cartridge bearings so it is easy to drop in a wider axel and 5mm spacer and re-dish the wheels. Using 20mm road rims I haven't noticed any major handling differences or a tendancy to pinch flat more often. But coming from a racing background I like at least 40psi in my tires. I'm currently running a Shimano 105 wheelset (20 and 24spokes) on a rigid Karate Monkey. My first ride on the wheels was a 7hour high country epic and I've logged many miles since then without a flat or even having to retrue the wheels. They have a little give to them so they might not be the best choice for a full-suspension rig. I've also used Mavic CXP 21's with no issues and my wife has a pair of older Rolf Comps on her Fisher Mt Tam. If you're running discs, consider the Mavic Speed City wheelset. The straight-pull spokes really reduce wheel deflection under hard braking and they are as light as most wheelsets out there. I'd like to check out Shimano's new 700c Touring wheelset for a disc brake set-up some time in the future as well.
Tom Miller
Kokopelli Bike and Board
Cortez, CO
 

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My wheelset is a bit like Tom's; basicly a road race wheelset. 105 hubs spaced out to about 133mm on the rear (close enough!), 14/17/14 Revolution spokes, and Open Pro rims. The Revolution spokes make a for a slightly laterally flexy wheel, but not unbearable. I weigh about 160, and with a Nano on the rear at 37psi and a Jones on the front at 34psi I have had no problems with the tire feeling squirrely from the narrow rim. The wheels have stayed true and I see no reason to change away right now.
 
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