Forza Cirrus Pro C30 - Dt Swiss 350s Hubs Carbon Road Wheelset Review
CX Review: 4ZA carbon Cirrus Pro T30 Disc disc brake tubular cyclocross wheelset
Every bit the season starts to current of air down, nosotros've squeezed in a lot of adept cross racing from our Cardinal European base, and have had the gamble to test a few new bikes and several wheel and tire combos. While tubeless setups have fabricated progress in the last yr or two for cyclocross, we still haven't constitute a setup that can trounce the functioning and reliability of a good fix of tubulars. This year we made the total switch to disc brakes for cyclocross, afterward converting a couple of steel bikes and simply adding in disc bikes in for examination. So nosotros had a pretty big need to outfit several bikes with proper cyclocross-ready disc restriction tubulars to glue up a range of treads. And 4ZA was able to step up and lend us a prepare of their new Cirrus Pro T30 Disc carbon wheels to test.
Nosotros've spent the better part of our cantankerous flavor railing wet, grassy corners and sliding through dirty turns on these Cirrus Pros. Now with just a few more races remaining in our season on what is forecast to be either snow & ice or heavy mud, it seems similar a good chance to have a await back on these all-weather wheels that accept carried us this far…
Tech Details
The Cirrus Pro T30 Disc wheels are built up on straight pull DT Swiss 350 hubs with DT Contest spokes, laced 2 cross with 24 spokes forepart and rear and with brass nipples. The Centerlock hubs come standard with a 15mm thru-beam front and QR rear (presumably because that is the current configuration of Ridley disc-brake bikes), merely are interchangeable to most axle standard with DT'southward modular tool-free snap-in end caps. The T30 Disc rim has a unique profile relative to the rim brake version with no braking surface, although both share the aforementioned basic 25mm wide x 30mm deep dimensions and blunt-nosed profile.
Retail price for this Cirrus Pro T30 Disc wheelset is 1375€, and even though they aren't listed on the 4ZA website at this time, they are available through whatsoever regular dealer of their partner bicycle company Ridley. Actual weight for our sample wheelset with quick release beam ends was 721g front/823g rear for a full weight of 1544g. That's just 40g over the claimed weight we were shown on some pre-flavour spec sheet and less than 25g heavier than the comparable radially-laced, rim-brake version of the aforementioned T30/DT350 line of wheels on 4ZA's website.
As of a week or so agone, 4ZA had really sold out of their current stock of these disc brake wheels. But they are actually laced by hand in Belgium past 4ZA'a own bicycle builders, so keeping upwardly with demand is old tough, merely it allows 4ZA to build new batches as needed. Nosotros've been told to expect them back in stock by the end of this month.
Long Term Thoughts
We really stumbled upon the 4ZA wheels back at Eurobike when searching for European disc brake tubulars for racing cross. We do our best from our Prague HQ to focus on European companies, and fifty-fifty though we know and encompass 4ZA'southward parent visitor Ridley well, we hadn't seen their disc restriction wheels.
The T30 Disc wheels are a little heavier than some of the similar depth carbon and aluminum wheels nosotros currently accept on test, just that is something we haven't really discover from the 24-hour interval they left the calibration and had a set of tires glued upward. In fact because of their 25mm wider profile and more shallow rim bed, we were able to glue on a set up of 33mm Hutchinson Toro tubulars with merely a single sparse layer of Vittoria's new Magic Mastik which really drops near 50g off relative to traditional tubular glues, cut that arrears a fleck already. One tires were on, the blunt overall T30 Disc rim contour has been well-suited for our cross racing.
For the elapsing of our test nosotros have had the multi-utilise Toro tubulars glued on, so the 4ZA have seen a lot of racing action. The tires take performed quite well in the damp to wet weather condition that have dominated our Key European race testing, so excluding a few excessively dirty courses and a couple of early season dry ones, that is what the wheels have had to bargain with every bit well.
We don't practise a lot of deep sand riding, merely a fair chip of mud, which they have cut through with relative ease. One thing that we accept noticed racing in sloppy conditions is that the low-gloss finish of the wheels has made them susceptible to getting and staying dirty. The finish isn't matte by whatever means, but isn't so slick the mud slides correct off. While that may sound like a cosmetic concern, when riding in deep mud that likely result in more friction of the mud sticking to the rims, and on a course with heavy mud the wheels did seem to anecdotally collect a scrap more mud and grass on them over the form of several laps compared to other wheels. That said, the tires that we had glued on weren't mudders, and then it was really only one super muddy section on a single course where nosotros noticed information technology.
The Cirrus Pro's utilize of standard DT Swiss hubs has made them incredibly adaptable and their build from standard, reliable components is probably i of their best selling points. Nosotros have swapped out the modular terminate caps on a few occasions to get dorsum and forth from quick releases to thru-axles, so that whatever bike we were racing at the time could easily end upwardly with the tires needed to suit the course conditions. Considering of that, while some other wheels with house-make hubs have been stuck to one cycle, nosotros had a adventure to ride the 4ZAs on iii cross bikes we have on exam, letting the states get a proficient sense for their operation.
And the feeling nosotros've gotten is that these are a tough ready of wheels with a dainty amount of give in them. While a lot of carbon wheels take been built with lightness and stiffness as priorities, we get the feeling that wasn't the case for 4ZA. The Cirrus Pro wheels have felt equally comfy on stiff carbon bikes and more flexible steel ones, and seem to smooth the ride over everything from hardpack braking bumps to cobblestones. At the aforementioned time, nosotros've done our best to ride them through some crude stuff and they have come out the other side as true as when they showed upwardly here and looking as good every bit new (once we clean the dried mud off them.) Durability for a season should be a given for a fix of wheels for riding cantankerous, especially at carbon prices. But that isn't always a safe bet, as we've dented a number of aluminum wheels in the same test period, and ane of our testers actually cracked ii of his own carbon wheels riding on our roads and trails (not products nosotros were testing.)
I feel pretty good well-nigh the Cirrus Pro Disc wheels, and when we need to box them up and transport them dorsum to Kingdom of belgium I'll be sorry to see them become (unlike some of the more fragile wheels we sample). Much like the American Classic Aluminum Tubulars that we tested last year (which were almost the same weight only both more narrow and shallow), these 4ZAs are the kind of all around wheel that nosotros were comfortable riding and racing twenty-four hour period in and 24-hour interval out. With a relatively low (for carbon) price and the reliability and flexibility of standard DT components, they would make a dandy wheelset for anyone looking to train and race on one a set up of tubular wheels.
4ZA.com
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Source: https://bikerumor.com/cx-review-4za-carbon-cirrus-pro-t30-disc-disc-brake-tubular-cyclocross-wheelset/
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