An elliptical boost.
Boost your SRAM drivetrain with the Absolute Black SRAM Oval Boost148 Direct Mount Traction Chainring. It features a Boost-specific 52mm chainline , a narrow-wide tooth profile for chain retention, and a range of off-road-appropriate sizing. Absolute Black claims that its oval rings result in smoother rotation and improved traction compared to standard, round chainrings, and this oval chainring is compatible with SRAM GXP and BB30 long spindle cranksets that allow direct-mount chainrings.
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Reviews & Community
phat tire drivetrain sauce
- Familiarity: I've put it through the wringer
My bike fleet is getting all boosted. And I'm running fatter and fatter rubber. I've long been a fan of the absolute black parts and I think (psychologically at least!) the oval rings help in putting the power down. The boosted ring now helps in getting the correct chainline AND clearing wide rubber in back. Flipping a standard ring also works but I think it puts your ring a little further outbound than needed. If you're upgrading/updating your crank ring, I don't think you can go wrong with this.
Great on some, not on others...
- Familiarity: I've used it several times
Lets start by me telling you that I installed this ring on my Specialized 6fattie with 27.5+ tires. I went from a 28t round to a 30t oval.
Appearance wise, this thing is gorgeous. I loved it from the minute I took it out of the box. Fit and finish is awesome and its a breeze to install. Looking at this thing mounted on the bike with the AB bash guard is total bike porn.
Now for performance. Dont think that your gonna feel some huge difference. What you feel is that your drivetrain is smoother and your able to spin circles alittle easier. This will definitely help you on flat trails and long climbs. If you ride alot of XC or fire roads, I highly recommend adding this to your arsenal.
So here's the reason im giving this 4 stars and not 5. I cant seem to clean those short technical climbs like I did with a round chainring. Im finding myself spinning out on climbs I never had an issue with. It just seems like I cant control my power output on those sections of trail anymore and its a bit frustrating. Multiple rides on the same trails and I spin out on the same short climbs. Conditions havent been the best lately since its late winter and pretty slick but I will def report back when it dries up a bit.
So to sum it up, its a nice piece. Its amazing on some sections of trails, not on others. At least thats what im getting out of it so far.