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PostPosted: Sun Mar 19, 2017 5:58 am 

Joined: Fri Feb 04, 2011 4:02 pm
Posts: 74
Location: San Francisco, CA
I bought a pair locally and have done a 100k, 3k meters with 20% gravel ride on them (Fishrock) with Armadillos and a bunch of additional straight road riding (with a lot of climbing) with GP4000sII tires. I've been running them at 80 psi front, 85 psi rear. I FTP at 290 and weigh 157 pounds. Most of my riding is on 303 firecrest tubulars laced to WI TI11, followed by Bora Ultra 35 tubulars and then HED Belgiums laced to CK R45. I've exclusively ridden them with a Baum Corretto.

So with that background:

1. They *feel* fast. Probably placebo. But I have been putting up good times on them. Eg today's ride: https://www.strava.com/athletes/12436

2. The GP4000sII 25 clincher, using digital calipers, comes out a hair under 28mm. I've run "wide" wheels for a long while, but none that produce such a wide tire. The HEDs are 17mm internal and I run 25mm tubulars on the other wheels, which keep their size. I really like the extra width. Gives more confidence in the turns on the fast descents. See the PR on the very steep backside of Hawk Hill today. And I wasn't trying and didn't feel like I was pushing.

3. Beyond the width, they're just confidence inspiring on descents from a handling perspective. I assume this is a combo of stiffness and weight. Their braking, however, isn't so great, which I'll get into below.

4. I get no brake rub with about 2-3mm of space. I get brake rub on the 303s laced to the WI TI11s all the time. I have to run the brakes wider. With Zipp hubs, even worse.

5. I had a fair bit of crosswind on the Golden Gate Bridge today. No problem. Not necessarily better than a Bora 35 or Zipp 303, but definitely no worse.

6. They're as comfortable as the Bora 35s. I find the Bora 35s to be very comfortable. I find the Zipp 303s, same tires, same pressures, to be noticeably less so. This is apples and oranges because I'm comparing the clincher CLX50 to the other 2 which are tubular, but net is comfort is as good as the Bora 35s, which I think are great.

7. Their weak point: their braking is pretty bad. Can you stop? Yes! But if the Bora 35s are really good for carbon rims (and decent in the wet, too) and the Zipp 303s OK in the dry (though scary as all heck in the rain - like - the hills of San Francisco are just downright dangerous on them), these are substantially worse in the dry and I don't yet know in the wet. Why worse? The front wheel gets hot fast and then starts squealing. The rear wheel, when braking with more than about 40% force, has been vibrating really strongly, which is then sent through the frame. It's terrible. I tried a bunch of different pads and moved the positioning of the brake shoes around a bunch. Tried clamping the QR very tight. But nothing worked. I sent it in to the bike shop today. They believe they've fixed it - primarily by swapping my Tune AC14 QR for a steel QR. Of course, I can run the Boras, Zipps and HEDs in the Baum without any problem with the AC14. I haven't yet picked it up to verify the QR change fixed the problem. Net: even if the rear wheel issue gets fixed, still substantially worse on the braking front than Boras or Zipp Firecrests. Of course, keep in mind, I'm comparing these CLINCHER CLX50s to TUBULAR 303 Firecrests and Bora 35s. It's possible I'd feel different if I had experience on the clincher versions of those wheels.

Net: the braking sucks, but I *love* everything else about these wheels. Comfortable. Fast. Stable. Confidence inspiring. No crosswind issues. I'm really impressed. I just wish they were 1 gen later on the braking front.

Posted: Sun Mar 19, 2017 5:58 am 

PostPosted: Sun Mar 19, 2017 3:09 pm 
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Joined: Wed Aug 18, 2004 6:06 pm
Posts: 87
Location: Lower Saxony - Germany
The CLX 50 brake track should be the "new generation" - did you try different brake pads?

Crosswind stability can be improved with 23mm tires on the front, that's what they are designed around, e.g. 24mm Turbo Cotton.

What's the weight? :)

PostPosted: Sun Mar 19, 2017 4:35 pm 

Joined: Fri Feb 04, 2011 4:02 pm
Posts: 74
Location: San Francisco, CA
Yup tried the Swisstop they came with, Zipp & Campy. All the same deal. Substantially worse than Bora and definitely worse than the 303s.

PostPosted: Mon Mar 20, 2017 4:17 am 

Joined: Tue Jun 30, 2015 3:30 am
Posts: 56
Glad to hear the positives here. I'm waiting for my CLX 32/50 disc combo. Hopefully it will be immune to the brake problem. Gonna run Pro One 25c. With the hookless design I guess it's easily 28mm when mounted.

PostPosted: Mon Mar 20, 2017 5:49 am 

Joined: Fri Feb 04, 2011 4:02 pm
Posts: 74
Location: San Francisco, CA
Quick update - shop tried pretty much everything to get the vibration problem when braking under control at the rear. Finally tried another wheel. Same problem. It's seem the Baum with a Dura Ace caliper with the clx 50 just isn't a great combo for rear braking. Gonna try an ee brake.

PostPosted: Tue Mar 21, 2017 1:45 pm 

Joined: Wed Sep 27, 2006 7:58 pm
Posts: 98
Location: Toronto
Just ordered a pair, in Canada they don't have stock of the rear wheel. Just read the Bike Ridar review of the CLX 64 and was contemplating cancelling my order. If you are in San Fran and ride a Baum I presume you got it from AboveCategory, they use Dura Ace skewers on all their builds. Hope I don't have the same issue with my Specialized re the rear wheel. In terms of wheels I Know the enve and Bora are better wheels but don't have the extra 1k$ to spend on wheels.
In terms of tire pressure, I have Hed Belgium and use 25c tires I am 175lbs. I run 75 and 80 and the comfort is like a magic carpet ride. I sometimes will go about over a week without putting tire pressure and end up at 65. Never had more flats than normal. I plan to run tubeless on the CLX 50 and plan to run 70 and 75. Streets are not the best in my area.

Sent from my iPhone using Tapatalk

Posted: Tue Mar 21, 2017 1:45 pm 

PostPosted: Thu Mar 23, 2017 3:47 pm 

Joined: Fri Feb 17, 2017 1:25 am
Posts: 7
I've just put a pair of CLX32's on my S-Works Tarmac and given the similarity bar height I thought I'd add my early observations for anyone that's interested. For now am running them tubed with Vittoria Rubino Pro G+ 25mm tyres as we still have some pretty poor late winter conditions, and experimenting between 80 and 90 PSI (I'm 81/82Kg and the bike is dot on 7Kg). All rides so far on less than perfect UK roads, this is what I've noticed:

- spin really well, the bearings are very smooth and silent
- the free hub is very quiet when riding, barely audible - can certainly freewheel in stealth mode!
- seem stiff, I haven't managed to induce any rub as yet, where I could on R-Sys and new Cosmic Pro Carbon that I tried
- it's been windy here lately and they don't get pushed around much or exhibit any extra steering pressure
- braking is fine in the dry (haven't been caught in the rain as yet) with plenty of power and modulation but with one exception....they squeal badly and it's loud, the front being the culprit. Haven't hit any longer descents to see how warm they get or if the braking fades, but will add those comments when I do after the weekend.

Overall I like them, apart form the braking noise, which I'm going to have the shop look at. They make the bike feel fast and responsive with no lack of stability at speed. Corner well too. Will be interesting to see what changes with a tubeless set up, or with lighter summer tyres.

Oh and for those weight-interested souls out there they are very close to the advertised 550g for the front. Mine weighs 962g built up with 25mm Rubino and QR. Take off the 235g for tyre, 64g for QR, 70g for tube and say 30g say for rim tape leaves 563g, not bad.

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