Found: Alden Tri-TT Designs Carbon Aero Covers for Chainrings, Trek Speed Concept & more!
Built for his own Trek Speed Concept triathlon bike, Glen Alden’s carbon fiber aerodynamic chainring and cable covers caught enough attention at events and online that he’s now making them for sale.
In most cases, the parts will require a bit of do-it-yourself installation (Triathletes, look away now), but the result are some very smooth sections that will set your bike apart. He’s also made his own aero computer mount between the aero bar extensions. Slip past the break for closeups, pricing and details…
The chainring cover is sized for 52-56T outer rings and shaped to fit any of SRAM’s road cranksets and Shimano 105. They’re available in various states of readiness, so depending on your comfort level and skill with a drill and Dremel tool, you can save a bit of coin if you’re willing to tap, poke and cut on your own.
The cover is held in place with nine stainless steel M3 button head cap screws and comes as a solid disc for $50. Get it with the crankarm hole precut and it’s $75, or ship him your crankset and he’ll install it all for $110. In all cases, they come with the screws. If you need the tools to tap and drill your chainring, he’ll send those for another $20.
With screws, the whole thing only adds about 45g. The disc itself is only 32g.
The Trek Speed Concept (and other bikes) funnel the shift and brake cables/wires into the frame directly behind the stem. Sure, they’re sort of tucked out of the wind there, but Alden’s cover smooths things over in a much more aesthetically pleasing manner.
The piece is curved to allow proper steering clearance and mounts to the top tube with double stick tape and the existing top tube mounts for Bontrager’s “nutrition storage box”, so no drilling or alterations of the frame are required.
It’s available with or without the slot for a Di2 controller box. It replaces the stock rubber cover on any 9.X series Speed Concept frame and will fit a wide range of their integrated stem sizes. Choose between gloss or matte carbon finish, weights are just 22g to 28g. Price is $60.
This carbon computer mount/cover is a work in progress. This one’s for his own bike, but if you’re interested let him know…he’s considering putting it into production, too.
All items are made by Glen in small batches in Indiana. Check out his website at www.alden-designs.com.