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Old 03-27-11, 07:37 AM   #1
BigBlueToe
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29er: Discs = Less Dish = Broken Spokes?

I'm building up a 29er for a ride this summer on the Great Divide Mountain Bike Route (GDMBR). I'll be carrying quite a bit of weight. I haven't built the wheels yet, but I put the rear hub in the frame and took a look at it. It looks like the flange on the drive side is almost in the same plane as the spoke holes on the rim. In other words, it looks like there's almost no dish on that side. I read somewhere else (someone's forum post) that disc brakes take up some of the space between the dropouts and allow less dish.

I've had spoke breaking issues on a previous touring bike. This will be a very bumpy ride. Now I'm wondering if I've made the wrong choice. Should I reconsider the discs and go back to V-brakes? Should I ride my 26" mountain bike instead of the 29er?

HELP! I was starting to get so excited about the new ride. Now I have doubts.
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Old 03-27-11, 10:43 AM   #2
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I'm no wheelbuilding expert, but I don't think you should have anything to be worried about. What rear hub and rim choice? If you choose the right parts for the application, and the wheel is properly built, you shouldn't have any issues.

IMO, stay excited....no problems.
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Old 03-27-11, 11:23 AM   #3
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Most of the GDMBR guys use disc brakes... your spokes will break. At least you won't need a new wheel due to rim wear? As long as you've put the correct amount of dish on the wheel and the rim is centered in on the hub there isn't more todo?
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Old 03-27-11, 05:14 PM   #4
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are you a heavy rider?

I hope to do that Great Divide race in 2012 or 2013 too. Good Luck!!
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Old 03-27-11, 08:19 PM   #5
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I weigh 200 lbs. and am tall so all my stuff - clothes, tent, sleeping bag, etc. - is extra large. I carry a big load. I try and go as light as possible but there are some things you just have to have!

The hubs are Deore XT, 36-spokes. The rims are Mavic 719's. The spokes are double-butted.

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Old 03-27-11, 08:27 PM   #6
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Quote:
Originally Posted by mx_599 View Post
are you a heavy rider?

I hope to do that Great Divide race in 2012 or 2013 too. Good Luck!!
I'm not going to race. Those people are crazy! (My hat's off to them and I'm jealous of their ability and proclivity to do something like that, but it's not for me. I'll have had my 60th birthday before I leave.) I'll be basically following the route outlined in Mike McCoy's book, "Cycling the Great Divide."
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Old 03-27-11, 08:50 PM   #7
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Quote:
Originally Posted by BigBlueToe View Post
I weigh 200 lbs. and am tall so all my stuff - clothes, tent, sleeping bag, etc. - is extra large. I carry a big load. I try and go as light as possible but there are some things you just have to have!

The hubs are Deore XT, 36-spokes. The rims are Mavic 719's. The spokes are double-butted.
Well, at 200lbs + gear i would have figure you'd take 26" wheel and 36h. Particularly because it's offroad ... but since this is a not the case just be sure to carry extra spokes and nipples.
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