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Thread: Aluminum wheelset question...

  1. #1
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    Default Aluminum wheelset question...

    I've been thinking about new wheels that will see a lot of time on the gravel/dirt roads around here and have found a great deal on the DT Swiss PR 1400 Dicut Oxic wheelset. They get great reviews both on this forum and elsewhere and seem to fit the bill in terms of both function and aesthetics. They recently came out with an additional depth - 21mm at 1450g and 32mm at 1633 g - both with the same width (18mm internal, 21.5mm external).

    My question - is there any real aero benefit to a 32mm rim depth vs a 21mm one? I do think it looks a bit cooler - for whatever that's worth.

    What would you guys choose?
     

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    Default Re: Aluminum wheelset question...

    The one that looks cooler

    Cheers
     

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    Default Re: Aluminum wheelset question...

    Bet you'll ride faster on the one that looks cooler.
    Dan Fuller, local bicycle enthusiast

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    Default Re: Aluminum wheelset question...

    Wheelbuilders here have likely more accurate info, but my gut feel is that the higher rim holds up much better.
     

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    Default Re: Aluminum wheelset question...

    Quote Originally Posted by rcunnane View Post
    I've been thinking about new wheels that will see a lot of time on the gravel/dirt roads around here and have found a great deal on the DT Swiss PR 1400 Dicut Oxic wheelset. They get great reviews both on this forum and elsewhere and seem to fit the bill in terms of both function and aesthetics. They recently came out with an additional depth - 21mm at 1450g and 32mm at 1633 g - both with the same width (18mm internal, 21.5mm external).

    My question - is there any real aero benefit to a 32mm rim depth vs a 21mm one? I do think it looks a bit cooler - for whatever that's worth.

    What would you guys choose?
    It's not going to matter for the use-case you described. Flip a coin.
     

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    Default Re: Aluminum wheelset question...

    32mm rim may be a bit stiffer and more aero. I'd use the lighter one for your specific use case.
    --
    T h o m a s

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    Default Re: Aluminum wheelset question...

    I'd be concerned about damage to the brake track riding off road. I've got a set I use as my everyday road wheels, and they've held up well for 2000+ miles but I don't think they're designed to stand up to consistent dirt/gravel use.
     

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    Default Re: Aluminum wheelset question...

    Quote Originally Posted by jwalther View Post
    I'd be concerned about damage to the brake track riding off road. I've got a set I use as my everyday road wheels, and they've held up well for 2000+ miles but I don't think they're designed to stand up to consistent dirt/gravel use.
    I have a couple sets (21mm) and love them. Great wheels. But I'm inclined to agree. I've taken them offroad a few times and they held up ok, but I think consistent and repeated contact with rocks will mar them pretty badly. I have a set of HED Belgium rims that I take off road a lot and the rims are really scratched up. With the coated rims on the Oxic I think you'd have a bit of a mess. Again, mine look great and have held up much better than some of my other coated rims (I'm looking at you Fulcrum), but I'd go for a more traditional rim on a gravel build.
     

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    Default Re: Aluminum wheelset question...

    How heavy are you? All else equal the deeper rim will be stiffer and stronger and resist impact damage better.

    18mm is pretty narrow (these days) for wheels intended to get off pavement.
    Dustin Gaddis
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    Default Re: Aluminum wheelset question...

    Quote Originally Posted by dgaddis View Post
    How heavy are you? All else equal the deeper rim will be stiffer and stronger and resist impact damage better.

    18mm is pretty narrow (these days) for wheels intended to get off pavement.
    Thanks for all the input fellas. "Gravel" is a somewhat loose term here - we're really talking about dirt roads (sometimes in better condition/smoother than our paved ones!). So, while they wouldn't really have to contend with larger stones there would be a fair amount of grit involved. As for weight - I'm about 180-185lbs and 6'2". I have an old pair of velocity A23s laced 20/28 to the older White Industries hubs and sometimes get some flex/brake rub in the front wheel when out of the saddle.
     

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    Default Re: Aluminum wheelset question...

    I'd go with the deeper option, or a different rim altogether with a bit more width. A 21mm deep rim w/20 spokes on is going to wiggle a bit.
    Dustin Gaddis
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    Default Re: Aluminum wheelset question...

    Boyd Altamont is a good rim for Gravel and road.
    Weight Doper

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    Default Re: Aluminum wheelset question...

    Quote Originally Posted by bigbill View Post
    Boyd Altamont is a good rim for Gravel and road.
    The Altamonts are definitely in consideration, particularly given the wider profile. Is the hesitation on the DT wheelset due to the Oxic coating? If so, then should I be wary of the ceramic coated Boyd rims as well. Both seem to claim that their respective coatings hold up to wet conditions - which I would assume implies they can handle some grit.
     

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    Default Re: Aluminum wheelset question...

    Quote Originally Posted by rcunnane View Post
    The Altamonts are definitely in consideration, particularly given the wider profile. Is the hesitation on the DT wheelset due to the Oxic coating? If so, then should I be wary of the ceramic coated Boyd rims as well. Both seem to claim that their respective coatings hold up to wet conditions - which I would assume implies they can handle some grit.
    "Some grit" in the context of road riding is not the same as a muddy gravel/dirt road ride. IMO, for a bike intended for off-pavement use, I wouldn't spend extra money for coated rims, because you WILL wear the coating off at some point (tho I can't say if it'll be in one nasty ride, or twenty).

    I can't imagine any coated rim surviving a day like this. Taken at the end of a 200k race I host, it started raining about 3hrs or so into the race.

    EDIT to add :: +1 for the Altamonts. As nicely made a rim as available anywhere. For extra points, the man Boyd himself won the 100k version of my race the year this pic was taken!



    Me & Boyd (he finished just as the rain started, which is why he's so fresh and so clean)
    Last edited by dgaddis; 3 Days Ago at 02:48 PM.
    Dustin Gaddis
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    Default Re: Aluminum wheelset question...

    I guess the obvious solution is that I need a new disc frame...:)
     

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    Default Re: Aluminum wheelset question...

    I prefer a lower profile wheel. They handle cross-winds better and I'd prefer not advertising that I ride 30 mph when the truth is not even close. I'm all about understatement. -Mike G
     

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    Default Re: Aluminum wheelset question...

    Quote Originally Posted by fastupslowdown View Post
    I prefer a lower profile wheel. They handle cross-winds better and I'd prefer not advertising that I ride 30 mph when the truth is not even close. I'm all about understatement. -Mike G
    Campagnolo Shamals (or whatever the Fulcrum equiv. is.) Just saying. I bought my first pair while spending winters out in the Hamptons. Headwind in every direction or so it seemed. Those wheels are amazingly good in excessively windy conditions. Like an extra gear. Beautamous.

    Jorn Ake
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    Default Re: Aluminum wheelset question...

    Quote Originally Posted by j44ke View Post
    Campagnolo Shamals (or whatever the Fulcrum equiv. is.) Just saying. I bought my first pair while spending winters out in the Hamptons. Headwind in every direction or so it seemed. Those wheels are amazingly good in excessively windy conditions. Like an extra gear. Beautamous.

    i just went with bora 3.5 on a new build. figured i didn't want to make the new bike too close to the current one. this way i have reasons to ride both
     

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    Default Re: Aluminum wheelset question...

    Quote Originally Posted by fastupslowdown View Post
    i just went with bora 3.5 on a new build. figured i didn't want to make the new bike too close to the current one. this way i have reasons to ride both
    Well those are okey dokey too. :-)
    Jorn Ake
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    Default Re: Aluminum wheelset question...

    Damn, totally jonesing for the 32mm PR1400s. And I have a buddy at DT. Hmmmmm.....
    -Dustin

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