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PostPosted: Sun Nov 05, 2017 4:43 pm 
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Joined: Sun Nov 05, 2017 4:31 pm
Posts: 9
Hi Forum!

I have currently Zipp 202 Tubular and have the ability to buy one additional pair of wheels.

I am 56kg light and love climbing (5'000m of elevation on a day is possible) but also do IM70.3.

Now I can not decide if I shall get ultra light wheels like the AX-lightness 25t ultra or the AX 55t ultra which are much more aero.

Does anyone some suggestions or even better wheels in mind which could fit for me?

Thx for you suggestions and help.


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Posted: Sun Nov 05, 2017 4:43 pm 


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PostPosted: Sun Nov 05, 2017 5:56 pm 
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Posts: 110
I'd say you already have a pair of climbing wheels... which were used by PRO climbers... I seem to recall Contador was using them a few years back.

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PostPosted: Sun Nov 05, 2017 6:02 pm 
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I agree but also not. The weight difference is almost 400 Gramms which is a lot.


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PostPosted: Sun Nov 05, 2017 6:27 pm 
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Joined: Sat Jul 20, 2013 6:11 pm
Posts: 1254
half-ironman.. frankly is a long enough distance for proper tri/TT bike.. even something like a older p2/p3 cervelo is good enough... Get the climbing wheels ya want then a proper tri bike for the IM's.


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PostPosted: Mon Nov 06, 2017 7:11 am 
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Joined: Sat Feb 25, 2012 10:01 am
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Location: Kuala Lumpur, Malaysia
You cant have the best of both worlds, especially when you put a high importance on weight. Suck it up and pick the one that looks nice on your bike.


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PostPosted: Mon Nov 06, 2017 9:07 am 
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Joined: Wed Jan 22, 2014 11:48 am
Posts: 2515
Location: Vienna Austria
If are riding in low yaw (let's say under 5°) conditions, narrow low-profile wheels with not-too-wide tires are very aerodynamic - probably lower overall resistance than a tall wheel with wider tires.

-> Get the light wheels and mount the fastest tires you can find.


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PostPosted: Mon Nov 06, 2017 11:24 am 
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Marin wrote:
If are riding in low yaw (let's say under 5°) conditions...


Can you choose to ride at a particular yaw angle? :shock:

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PostPosted: Mon Nov 06, 2017 11:54 am 
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Joined: Wed Jan 22, 2014 11:48 am
Posts: 2515
Location: Vienna Austria
whosatthewheel wrote:
Can you choose to ride at a particular yaw angle? :shock:


Yes, if you aren't riding on the coast, in extreme winds or very slowly, you'll be under 5°.


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PostPosted: Mon Nov 06, 2017 3:23 pm 
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Joined: Fri Sep 09, 2011 2:38 pm
Posts: 131
Location: Brighton, UK
The new wide Corima 32 tubulars are a nice compromise.

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PostPosted: Mon Nov 06, 2017 3:34 pm 
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StradaJon wrote:
The new wide Corima 32 tubulars are a nice compromise.
Using Extralite 32mm height and 26mm width as well, 898g. But I wouldn't call it very aero.

I have this feeling you'll have the budget to get a dedicated speed bike for events, so go for the light wheels.

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Last edited by Kayrehn on Mon Nov 06, 2017 3:34 pm, edited 1 time in total.

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PostPosted: Mon Nov 06, 2017 3:39 pm 
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Location: Brighton, UK
To be fair AX tubs build up ok, the clinchers should be avoided though.

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PostPosted: Mon Nov 06, 2017 3:54 pm 
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Posts: 561
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StradaJon wrote:
To be fair AX tubs build up ok, the clinchers should be avoided though.


Delamination issues?


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PostPosted: Mon Nov 06, 2017 8:48 pm 
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Joined: Sun Nov 05, 2017 4:31 pm
Posts: 9
I haven’t yet considered to buy a tri bike. The IM track has 1500m elevation so a heavy tri Bike is not ideal . And for a proper and bit lighter one the spare cash is missing.


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PostPosted: Mon Nov 06, 2017 10:27 pm 
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We experienced disc clinchers only. I gave up on them in the end after inconsistencies then later they went direct to consumer.

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PostPosted: Wed Nov 08, 2017 1:01 pm 
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Posts: 171
Location: Sydney
I chose AX 45 Ultra C for the aero/weight compromise, my mate got the 28 Ultra C. I'm very very happy with the 45's and am glad that is the way I went. They are noticeably quicker over 30kph and are no fuss in cross winds (they are basically modeled on the Zipp 303 shape). Not as stiff as Lightweights but much much more aero and as i said no issue in crosswinds like the LW's! I am not running them tubeless, but as you are going tubular that is not worth mentioning, more just the shape.. The braking has been excellent and quiet. The fact that AX has gone to a direct model is a good thing, distributors and shops are not happy as they put in work to sell the brand but for the end user it's a win. AX said specifically that they just didn't want the price to go crazy and selling direct was the only way to keep the prices where they are. Personally they have been great to deal with and if there are any issues surely better to go direct to them than have to go via a shop..

To the original question, my bike is 5.8kgs with the 45's the 28's would have saved something like 100-130g for me the aero advantage was worth it 100% as they so light to begin with that you just notice the weight between the two rim depths.


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Posted: Wed Nov 08, 2017 1:01 pm 


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