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Road Disc Rims

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Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway
View Poll Results: Drillings for Road Disc Rims
24/24 hole
10
40.00%
24/28 hole
4
16.00%
28/28 hole
2
8.00%
28/32 hole
2
8.00%
32/32 hole
7
28.00%
Voters: 25. You may not vote on this poll

Road Disc Rims

Old 08-05-21, 01:45 PM
  #26  
tomato coupe
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Originally Posted by bob dopolina View Post
"apparently, an edit is required: If you have a road bike, and if it has disc brakes, and you were choosing new wheels (not the ones that came oe on the bike - as applicable) what drillings would you choose?"
24/24.
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Old 08-05-21, 06:00 PM
  #27  
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Fulcrum racing 3 no rim strip required. 21/21. Mine have been great.

https://www.merlincycles.com/en-us/f...els&ucpo=78525
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Old 08-05-21, 07:31 PM
  #28  
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In case anyone is still wondering, this is about ordering stock.

I kept hearing that we don't need to stock 32H for road disc. My gut said that 28/32 alloy is still needed. Although this is a tiny sample size I'm going to insist we stock 28/32 for alloy road disc.

Thanks to those who helped me listing to my gut - although I'm still interested in hearing what ya'll have to say about this so post at will.
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Old 08-06-21, 08:41 AM
  #29  
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Just received a set of DT Swiss rims and hubs a couple weeks ago from prowheelbuilder for a new Ritchey Road Logic Disc build. 28/28. I weigh 210#.

...and fer God's sake, get off my lawn and change your taste in music!

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Old 08-06-21, 09:00 AM
  #30  
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I have three sets of 24/24s: mid-level Al, top-quality Al, and top-quality CFRP. All are perfect after many thousands of miles on bad roads.
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Old 08-06-21, 09:29 AM
  #31  
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Originally Posted by WhyFi View Post
Not with discs, you don't.
Why are there are no radially laced disc front wheels?

(Not debating; I don't have disc brakes and so am just trying to learn more about disc brakes and disc wheels to prepare for the eventuality of switching.)
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Old 08-06-21, 09:32 AM
  #32  
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Originally Posted by WhyFi View Post
Not with discs, you don't.
Of course stupid me.
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Old 08-06-21, 09:32 AM
  #33  
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Originally Posted by SoSmellyAir View Post
Why are there are no radially laced disc front wheels?

(Not debating; I don't have disc brakes and so am just trying to learn more about disc brakes and disc wheels to prepare for the eventuality of switching.)
They can't deal with the transmission of the braking forces.
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Old 08-06-21, 10:01 AM
  #34  
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Originally Posted by Racing Dan View Post
Fewer spokes sell more wheels cos ppl think its more aero and lighter, not knowing the rim need to be beefier to support higher spoke tension.
You got me there, at least on the lighter aspect.

Originally Posted by WhyFi View Post
They can't deal with the transmission of the braking forces.
I see. But if that is the case why not 2x laced on the left disc side and radially laced on the right side?
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Old 08-06-21, 10:05 AM
  #35  
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Originally Posted by SoSmellyAir View Post
I see. But if that is the case why not 2x laced on the left disc side and radially laced on the right side?
Some manufacturers, like Campy/Fulcrum, do 2:1 lacing.
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Old 08-06-21, 10:34 AM
  #36  
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I ride road and gravel on 24 spoke alloy and carbon disc brake wheels.

Maybe more spokes were needed in the old days of noodly shallow rims and questionable spokes but all reputable manufacturers sell 24/24 disc brake wheels and if you are within weight limits, I don't see a problem.
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Old 08-06-21, 10:38 AM
  #37  
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Originally Posted by nomadmax View Post
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Old 08-06-21, 02:49 PM
  #38  
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Old 08-06-21, 02:52 PM
  #39  
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Originally Posted by WhyFi View Post
Some manufacturers, like Campy/Fulcrum, do 2:1 lacing.
Ah. Turns out I had not checked out the higher end Fulcrum disc wheels, or I would have learned that.
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Old 08-07-21, 03:02 AM
  #40  
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Originally Posted by Branko D View Post
all reputable manufacturers sell 24/24 disc brake wheels and if you are within weight limits, I don't see a problem.
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Until you break a rear spoke/nipple (and they will have more stress and likelihood of breaking since the weight isn't as spread out) and your rear tire is jammed up against your chainstay. And if you don't have a spoke wrench or don't know how to true a wheel to spend 10 minutes on the side of the road tweaking it enough to limp home then you're stranded with no team car following you haha. I see no disadvantage at all to having an extra 4-6 spokes except for looks. It won't make you slower.
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Old 08-07-21, 03:58 AM
  #41  
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A quality road wheel breaking spokes is rare enough that I can live with 10 minutes of faffing about if it breaks. Maybe in ages past spoke breakages were common, now they're simply not. Especially if you're not stretching the weight limits. Hence every big manufacturer is making their quality road disc wheels in 24/24 and sometimes less.

A heavier, custom made wheelset with a high spoke count certainly isn't going to make you any faster, either.
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Old 08-07-21, 06:19 AM
  #42  
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Originally Posted by Lazyass View Post
Until you break a rear spoke/nipple (and they will have more stress and likelihood of breaking since the weight isn't as spread out) and your rear tire is jammed up against your chainstay.
This is much less of a problem with discs. The last few broken spokes that I've seen (one of them was mine) were all low spoke count wheels and none threw the wheel out of true enough to interfere with rotation.
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Old 08-07-21, 12:52 PM
  #43  
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Depends. My data point:

175#
Road only (no gravel)
Roval SLX 24 wheels running 700 x 28 GP5000
24 spokes per wheel

Never an issue.
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Old 08-08-21, 05:10 PM
  #44  
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Well Giant decided that 21/24 was enough for the shallow section carbon rims (SLR 1) on my Giant Defy. They seem robust enough for my 80 kg butt and pot-holed roads.
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Old 08-09-21, 12:38 AM
  #45  
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Originally Posted by Branko D View Post
A quality road wheel breaking spokes is rare enough that I can live with 10 minutes of faffing about if it breaks. Maybe in ages past spoke breakages were common, now they're simply not. Especially if you're not stretching the weight limits. Hence every big manufacturer is making their quality road disc wheels in 24/24 and sometimes less.
Originally Posted by WhyFi View Post
This is much less of a problem with discs. The last few broken spokes that I've seen (one of them was mine) were all low spoke count wheels and none threw the wheel out of true enough to interfere with rotation.
Yep, I broke a spoke earlier this summer. A few observations:

1) 24 spoke wheels can get pretty wobbly when you break a spoke.
2) Disc brakes tolerate really wobbly wheels.
3) Internal nipples are inconvenient.
4) A wheel set that requires 3 or 4 different spoke lengths is inconvenient.

5) None of the above matters much if you break a spoke once every 20-30 years.
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Old 08-09-21, 03:03 AM
  #46  
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Originally Posted by Branko D View Post
A quality road wheel breaking spokes is rare enough that I can live with 10 minutes of faffing about if it breaks. Maybe in ages past spoke breakages were common, now they're simply not. Especially if you're not stretching the weight limits. Hence every big manufacturer is making their quality road disc wheels in 24/24 and sometimes less.

A heavier, custom made wheelset with a high spoke count certainly isn't going to make you any faster, either.
​​​​​
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In no way, shape or form will you notice any performance gain or any kind of advantage at all with four fewer spokes per wheel. A spoke only weighs @ 5 grams. And you don't break a spoke or a nipple until.... you do.
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Old 08-09-21, 03:24 AM
  #47  
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Originally Posted by Lazyass View Post
In no way, shape or form will you notice any performance gain or any kind of advantage at all with four fewer spokes per wheel. A spoke only weighs @ 5 grams. And you don't break a spoke or a nipple until.... you do.
Not being able to buy any high end factory road bike disc wheel but having to buy something custom with a highly restricted choice of hub is certainly not going to make you faster.

Everything can break, sure, but it's such a rare event that avoiding mainstream 24/24 wheels is a bit like avoiding CF road bikes because carbon might break.
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Old 08-09-21, 11:30 AM
  #48  
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I would worry a lot more about the type of riding than the type of brakes.
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Old 08-09-21, 12:11 PM
  #49  
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Originally Posted by SoSmellyAir View Post
Ah. Turns out I had not checked out the higher end Fulcrum disc wheels, or I would have learned that.
Also the higher end Roval wheels like the Terra CLX I've been looking at although the price gives me pause.

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