Giant’s new TRX (carbon) and TRA (alloy) WheelSystems have bold performance claims for trail and enduro bikes, available as both stock and aftermarket wheelsets. After being put through testing by their Factory Off-Road team, Youn Deniaud went on to take an Enduro World Series win in Loudenvielle, France this season.
The TRX and TRA wheels come in dual 29” or mixed (29 front, 27.5" rear) setups, plus there’s an eMTB version with steel hub components for increased durability.
Two stand-out features on the new wheels are the 5mm wide rim sidewall, which Giant calls Wide Guard technology, and their high engagement 72-tooth, pawl driver in the rear hub.
TRX and E-TRX Details• Carbon rims
• 5mm Wide Guard rim sidewall
• 28-hole, straight-pull hubs
• eMTB version uses steel axle and freehub
• Weight: 1,846g (29" w/XD driver), 1,989g (29" E-TRX)
• Price: €699-749 EUR / $899-1099 CAN, (USD: TBD)
•
giant-bicycles.com Moving material around at the rim sidewall isn't a new idea, but in the lab, Giant claim the wider rim sidewall proved to dissipate energy more than competitor's rims. Wide Guard Technology is on both 30mm wide carbon and alloy rims to stave off pinch flats and rim damage.
| Both WheelSystems were shown to withstand the highest impact force without flatting, outperforming previous generation Giant WheelSystems and other wheels in the category by up to 44%.— Giant Bicycles |
Rim impact test results on the left, hub durability on the right.
Giant is claiming these new hubs with their 72-tooth pawl driver have "instant engagement," although I'd say that's actually marketing lingo for "quick engagement." Depending on how the pawls are engaging, there's likely either 2.5 or 5-degrees between points of engagement, although we're still waiting for more details from Giant. Those are available for HG, Micro Spline, and SRAM XD drivers. The Boost Trail spacing hubs are only available in 28-hole and use Sapim Laser straight-pull spokes with Double Square nipples.
Test results conducted by Giant claim that the TRX HE hubs are five times “more durable” than the competitors. The eMTB hubs use a steel axle and driver body, however, it’s unclear which hub was used to gather those stats. Also, “more durable” is defined as “showing signs of significant wear”, which doesn’t mean failure.
In terms of claimed weight, the 29er versions of TRX and E-TRX Wheel Systems measure up at 1846g and 1,989g (steel internals) with the mixed wheeled versions saving 35 and 18g, respectively. On the alloy side, the TRA and E-TRA wheels roll in at 1,947g and 2,070g (29).
The TRX pricing varies depending on the wheel size between €699-749 EUR / $899-1099 CAN, while the TRA ranges from €299-429 EUR / $399-599 CAN. USD Pricing, as well as the E-versions of each wheelset, will be finalized in the New Year.
I feel like the generic brands should have an edge when it comes to pricing just by way of their scale.
They’ve gone and reinvented the wheel?
Crazy man. Just crazy
I will say though, the old carbon rims and hubs have been pretty bombproof and ride quality was great and would probably be pretty happy to run these rims if they came on a bike I bought.
The damaged rim is still in use today (I put a stick into the wall of the rim and it now has a 1cm hole in it) and whilst I wouldn't race an EWS on it, it holds air, goes round and perfectly fine for local rides.
Not all that impressive.
I had a Novatek/WTB ST wheel from a Kona Process that was apparently made of old boat anchors (over 2.3kg, almost 2.4kg), and cheese (it dented constantly even with DD tires and ~30psi).
( UK residents joke )
They are pretty heavy as well, if you want an anti-pinch sidewall for your carbon wheels, get a set of Roval Controls, they are quite a bit lighter, cheaper and come with a (2 year) free crash replacement warranty.
As a moderately famous Canadian once said... "I'm crushing your head!"
This is great news - maybe they can start weighing the bikes now...