But weighs just under a ton
Mavic 821 rims
- Thread starter Dogboy
- Start date
My thought is that with narrower rims (such as the 721) the rim itself is protected more due to a "mushroom" like tire profile. The wider the rim gets, you will have more of a "squareish" profile and the rim is more susceptible to rock strikes, especially when the bike is leaned over a bit. I personally don't think wide rims are necessary. I went from the old 321's to Sun MTX's to 721's and I don't think I've lost much in durability or ride performance at all.
It was Freeride mag. The wide rims created a tire profile in which the rim walls were right under the channel between braking and cornering knobs on tires such as HighRollers. Because of the missing protection from the knobs they ruined a set of rims on a couple of DH runs on rocks (they weren't even East Coast Rox). So Pegboy's suspicion is right.
That's an unexpected epic fail
I think there's such a thing as too-wide-rims. I've settled on my favorite rim widths through trial and error. In the past I tried really wide rims like the 29 and 30mm inner width Mavic 729 and Intense Mag 30. I also tried narrow rims like 23mm with DH tires, 17mm with XC tires, and 21mm with AM tires. I'm happy with the tire profiles I'm getting using 23mm rims with the 2.1-2.4" tires on my XC and AM bikes and the 26mm rims with 2.5-2.6" tires on my DH bike.
Going wider makes it hard to create a strong, light rim and going narrower gives a tire profile that rolls in turns.
Going wider makes it hard to create a strong, light rim and going narrower gives a tire profile that rolls in turns.
Just want to point out that width is only part of the equation with tire profiles. Bead seat diameter and rim wall depth also play large parts. For example, Rhyno Lite XLs are 23mm internal; true 2.5s like Weirwolfs always had a V shaped profile mounted up. However the same tire on a 721 had a normal profile. I also never noticed a change in cornering when I switched from 325s to 721s on the back of my DH bike.
Because they have held up better than other rims I have used. BTW, tons of people love their Deemax wheelsets, and aren't those 23mm wide internally?
Also, as somebody also said, the rim width works in conjunction with the specific tire. Using a Maxxis 2.5 tire on a 23mm rim and going to a 25mm rim just squared it out a bit too much for me, and gave way to easily in corners. Going to a 21mm rim it cornered o.k., but it lost straight line grip...so back to 23mm for that great all around feeling. Then again, if I was using Schwalbe tires, I think a 25mm rim would be perfect.
729 + 2.5 minion dhf = the ultimate
If not for the weight, pretty much this.
I always used 2.7" DHFs, but yeah. Then I started experimenting with lighter rims and benefited from the acceleration but missed the width, stiffness, and strength of the old 729s. Now I'm using a carbon wheelset that's only 2mm narrower, stiffer, seats tubeless easier, and weighs just 1600g. Best of all worlds*!
*Well, the jury's still out on strength but so far no problems.
Ha, word yeah, I meant from a tire profile standpoint.
Is this real life?
nothing at eurobike it seems
Which rims are you running?
and then there's the carbon Stans NoTubes rims... wonder how those will pan out.
Light Bicycle DH rims.
Meh, just another low spoke count carbon XC wheelset. Plenty of those already to choose from. Of course this makes it obvious that a carbon Flow EX is somewhere down the line.
slightly moar info, though nothing about price: http://www.bikeradar.com/mtb/news/article/stans-notubes-valor-carbon-wheelset-introduced-38264/
They are on the Mavic site now:
http://www.mavic.com/rims-mountainbike-en-821-disc#.Uj_fRIbdd8E
http://www.mavic.com/rims-mountainbike-en-821-disc#.Uj_fRIbdd8E
well that's interesting... though I still have a couple of questions: how many holes? and what's up with UST tape?! I thought Mavic didn't need tape? that's part of the point...
where do you see mention of tape being required?
Specs say the rim has FORE, which is the tapped nipple insert thingy found in the 819 and 823.
Specs also say asymmetrical but the spoke holes don't look that way. I wonder if they'll have a rear rim made this way to help offset wider 11-sp cassettes.
Specs say the rim has FORE, which is the tapped nipple insert thingy found in the 819 and 823.
Specs also say asymmetrical but the spoke holes don't look that way. I wonder if they'll have a rear rim made this way to help offset wider 11-sp cassettes.
Looks exactly like the rim on my crossmax sx wheels.
sly: where are you seeing anything about tape?
This is all I see
sly: where are you seeing anything about tape?
This is all I see
under the manuals section. but maybe it doesn't apply to this particular product? (in which case, why have the manual listed on the product page?!???)
Anyways, tell me about your Crossmax SX wheels... do you run them tubeless? Do they keep a UST tire on? Do they dent easily, or are they more prone to cutting the tire than denting? Inquisitive minds need to know...
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450 grams...nice.
I am running this set up and it seems to work pretty well, except I keep bending the rear wheel and it's fairly dented up.
this will work as a rear wheel, on an enduro bike, as advertised
given mavic's maxtal construction and general 'stiff rim' history i think it will be ok - it is a trail rim after all, not a DH rim. i'm 170 and had an 819 cut through a tire sidewall on impact once. the rim had a tiny bent spot but was run fine for another 2 years and has been on my wife's bike for another 3.
considering my ~460g bonty dusters have held up fine with S 2bliss tires for the last 3 years i'd have no issue running this rim if i wanted to go skinny again.
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yup
yup
nope
yeah, a lil bit, just have to keep air in your tires
fvcking love love love love those wheels though. I've done all sorts of naughty things to them and there's one small ding on the rear rim. Just sealed up a new tire yesterday with no problems at all on it. Every time I put them in a truing stand they're still straight. I've tensioned them twice in two years (more like 'seasons').
The 821's are 450g without the nipple inserts, with the inserts they are pretty much 500 g.
And they are asymmetric.
I have 821 laced up on DT350 hubs. They seem hold up well. 500g for each rim with nipple inserts. I like the idea of nipple inserts, and as with EX823, spokes might get more abuse before they get broken compared to conventional rim without nipple inserts.
Michelin tires fit well on rims. They are one size smaller than Schwalbe so it works well on the relatively shallow width of rim. Riding them as tubeless and I find tire and rim combo more confidence giving, almost same as riding Dh tires without tubes. I guess Michelin get more meat on sidewalls in smaller size albeit higher weight per volume. By choosing that type of tires, I believe that the width of rim is about right. To set up tubeless is easy and straightforward.
Overall, Im happy and I wouldnt doubt to use front tire on dowhhill rig and I'm in camp of 26ers for a while.
Michelin tires fit well on rims. They are one size smaller than Schwalbe so it works well on the relatively shallow width of rim. Riding them as tubeless and I find tire and rim combo more confidence giving, almost same as riding Dh tires without tubes. I guess Michelin get more meat on sidewalls in smaller size albeit higher weight per volume. By choosing that type of tires, I believe that the width of rim is about right. To set up tubeless is easy and straightforward.
Overall, Im happy and I wouldnt doubt to use front tire on dowhhill rig and I'm in camp of 26ers for a while.
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I'm not sure I wanna know what's popping in and out of the bottom left of your animated gif...
looks flexy !
sorry.
sorry.
looks flexy !
sorry.
if you meant knobs at sides? I cannot stop thinking about it.
I'm kidding.
Anyone looking for one of these rims brand new? I haz one. 32 hole.
Never mind, I have an 823
Never mind, I have an 823
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Sorry Mavic, your (less) narrow rims still fail.
http://nsmb.com/ibis-wide-rims-ride-review/
I have not tried the Ibis version yet, but I have ridden a fat bike rim laced to a normal bike. It was heavy, but the ride was amazing. 20 psi and made a trail bike stick like a DH bike.
http://nsmb.com/ibis-wide-rims-ride-review/
I have not tried the Ibis version yet, but I have ridden a fat bike rim laced to a normal bike. It was heavy, but the ride was amazing. 20 psi and made a trail bike stick like a DH bike.
