The tires have performed quite well in the damp to wet conditions that have dominated our Central European race testing, so excluding a few excessively muddy courses and a couple of early season dry ones, that is what the wheels have had to deal with as well. One tires were on, the blunt overall T30 Disc rim profile has been well-suited for our cross racing.įor the duration of our test we have had the multi-use Toro tubulars glued on, so the 4ZA have seen a lot of racing action. In fact because of their 25mm wider profile and more shallow rim bed, we were able to glue on a set of 33mm Hutchinson Toro tubulars with just a single thin layer of Vittoria’s new Magic Mastik which actually drops about 50g off relative to traditional tubular glues, cutting that deficit a bit already. The T30 Disc wheels are a little heavier than some of the similar depth carbon and aluminum wheels we currently have on test, but that is something we haven’t really notice from the day they left the scale and had a set of tires glued up. We do our best from our Prague HQ to focus on European companies, and even though we know and cover 4ZA’s parent company Ridley well, we hadn’t seen their disc brake wheels. We actually stumbled upon the 4ZA wheels back at Eurobike when searching for European disc brake tubulars for racing cross. We’ve been told to expect them back in stock by the end of this month. But they are actually laced by hand in Belgium by 4ZA’a own wheel builders, so keeping up with demand is sometime tough, but it allows 4ZA to build new batches as needed. That’s just 40g over the claimed weight we were shown on some pre-season spec sheet and less than 25g heavier than the comparable radially-laced, rim-brake version of the same T30/DT350 line of wheels on 4ZA’s website.Īs of a week or so ago, 4ZA had actually sold out of their current stock of these disc brake wheels. 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 any regular dealer of their partner bike company Ridley. Actual weight for our sample wheelset with quick release axle ends was 721g front/823g rear for a total weight of 1544g. The Centerlock hubs come standard with a 15mm thru-axle front and QR rear (presumably because that is the current configuration of Ridley disc-brake bikes), but are interchangeable to most axle standard with DT’s 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 same basic 25mm wide x 30mm deep dimensions and blunt-nosed profile. The Cirrus Pro T30 Disc wheels are built up on straight pull DT Swiss 350 hubs with DT Competition spokes, laced 2 cross with 24 spokes front and rear and with brass nipples. 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 like a good chance to take a look back on these all-conditions wheels that have carried us this far… We’ve spent the better part of our cross season railing wet, grassy corners and sliding through muddy turns on these Cirrus Pros. And 4ZA was able to step up and lend us a set of their new Cirrus Pro T30 Disc carbon wheels to test. So we had a pretty big need to outfit several bikes with proper cyclocross-ready disc brake tubulars to glue up a range of treads. This year we made the full switch to disc brakes for cyclocross, after converting a couple of steel bikes and only adding in disc bikes in for test. While tubeless setups have made progress in the last year or two for cyclocross, we still haven’t found a setup that can beat the performance and reliability of a good set of tubulars. As the season starts to wind down, we’ve squeezed in a lot of good cross racing from our Central European base, and have had the chance to test a few new bikes and several wheel and tire combos.
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