Eurobike: SRAM’s new aluminium road wheels, exclusive RockShox bits

By James Huang, Technical Editor | Thursday, Sep 10, 2009 1.40pm

SRAM will expand its wheel portfolio with three new road models for 2010, all using 6061 aluminium rims, cartridge bearing hubs with alloy shells, freehub bodies and oversized axles, and low 18/20 spoke counts with wide flange spacing and one-cross/radial rear lacing.

The top-end S30 AL Race boasts an appealing claimed weight of 1,430g for the pair (645g front, 785g rear, without skewers), a 30mm-deep hybrid toroidal cross-section borrowed from the company's Zipp division, Sapim CX-Ray bladed and butted stainless steel spokes, hidden alloy nipples, and milled-out hub flanges for reduced weight. 

The mid-range S30 AL Sprint will be nearly identical save for an additional 65g of weight per pair.

The less expensive S27 AL Comp, however, trades in the hybrid toroidal rim shaping for a more conventional V-shaped 27mm-deep rim. 

Standard external nipples are also used and the hub flanges do without the weight-saving milling. Claimed weight is 1,620g for the pair (735g front, 885g rear, without skewers).

This rockshox prototype was mounted to canyon's projekt s5 show bike and looks to be an air-sprung version of the vivid 5.1.:

This RockShox prototype was mounted to Canyon's Projekt S5 show bike and looks to be an air-sprung version of the Vivid 5.1.

In the off-road department, we also spotted a new long-travel rear shock prototype mounted to Canyon's Projekt S5 and got an exclusive first look at a pending superlight cross-country model.

The cross-country rear shock looked to be based on RockShox's existing Monarch platform but was fitted with a carbon fibre air can in place of the usual aluminium bit, extra milling around the eyelets, plus a hydraulic remote lockout system similar to what's currently in use on the new XX-level forks. 

RockShox wouldn't provide an official name, specs or internal details on this prototype rear shock, but we assume it's aimed at the cross country racing market given the ultralight carbon body air sleeve.:

RockShox wouldn't provide an official name, specs or internal details on this prototype rear shock, but we assume it's aimed at the cross country racing market given the ultralight carbon body air sleeve.

RockShox product manager Sander Rigney wouldn't offer up much detail aside from the obvious but it seems a safe bet that we'll see a single XLoc remote lever controlling both front and rear suspension lockouts soon – albeit it with some sort of dual-piston arrangement to allow for each end's specific fluid volume requirements.

At least on this prototype, external adjustments are limited to rebound speed and air pressure, in addition to the remote lockout.: at least on this prototype, external adjustments are limited to rebound speed and air pressure, in addition to the remote lockout.

At least on this prototype, external adjustments are limited to rebound speed and air pressure, in addition to the remote lockout.

The machined red knob presumably provides external rebound damping adjustment but compression looks to be a factory-set item.

The long-travel air-sprung shock on the Canyon is clearly more generous in terms of adjustment, though. In addition to the single visible air valve on the large-diameter can, there are also external adjustments for rebound damping plus compression and ending stroke rebound settings on the bypass channel leading up to the piggyback reservoir. 

No word yet on when this shock will be available but our guess is this will ultimately be an air-sprung variant of the current Vivid 5.1. Stay tuned.

Related articles

SRAM has enlarged its power meter range as well with SRM as well as Quarq-based cranksets for 2010, both with ANT+ wireless transmission for use with compatible head units from SRM, Quarq, Garmin, iBike, CycleOps and others. 

The S975 SRM crankset uses the German company's proven strain gage technology for a 922g claimed weight (with bottom bracket) while the newer S975 Quarq system boasts a lighter 884g claimed weight and a user replaceable battery. 

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User Comments

There are 4 comments on this post

Showing 1 - 4 of 4 comments

  • I hope the new "Monarch" shock is better than mine. O-ring on adapter was damaged/leaking air on frames arrival. Not good...

  • an air version of the vivid sounds good.

  • I bought the SRAM S27 AL to replace my worn out front wheel, and I absolutely love the new one. It's built very well, and although rather light, it's sturdy. The tube liner is a thin red plastic liner, instead of rubber, so it should last some time. It has a spoke count of 20, but the rim is very solid and handles quite a bit more abuse than my old one did with 32 spokes. The spokes are also flat to go with the aero design, and they are very strong and not easily bent. So far, I haven't noticed any bearing noise. It seems very quiet, and the wheel takes a very long time to stop on its own. I still have my old rear wheel, which makes a pretty loud clicking from the bearing (it's still in good shape), so I can't tell if the S27 AL actually makes any noise at speed. The graphics are decals, and I hope they can last a few summers in Vegas, because they look really good. The graphics are a big part of why I bought the S27 AL.

    Now I just have to match it on the back.

  • ^ Adding to my earlier comment...

    Last night, I had a blowout after hitting something in the dark that was rather large - at about 25mph. It took me down to the ground in just a few seconds, and both my bike and I bounced around quite a bit. I watched my new wheel smash into the ground a few times, and I was sure I bent it. But I was wrong. It's still true after that, which completely amazed me. In fact, I've only trued it once since I bought it, and I've trued my real wheel at least once a month since then. There is a bit of gashing from the object I hit and some of the road before I lost control, but it's not bad enough to hurt anything. It's a very solid wheelset, and it's one of the best add-ons I've put on my old bike.

    One more thing: Watching the decals while riding kind of drives me to push a bit harder. It's a pretty cool effect.

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