The Original one and only absoluteBLACK Premium 1X RaceFace Boost compatible, narrow wide Oval chainrings in PVD Rainbow (oil slick) colour. designed for RaceFace CINCH direct mount system. This version is for Boost bikes and FAT BIKES (when reversed). Optimized for 10/11 & 12spd. It is the most Premium oval chainring on the market with scientifically proven performance gains.
NOTE: Due to the nature of PVD process, every chainring is unique and color may vary. Not a single chainring is the same which makes your new ring completely individual. You can indicate to us, in comments section during the checkout, if you prefer more gold-purple or more blue/green-purple, but we can not guarantee to meet your request.
You can also check the same chainring in Anodized colors here.
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Size (Mass +/-1g): |
28T (54g), 30T (58g), 32T (62g), 34T (69g) |
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Color |
PVD Rainbow (oil slick) |
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Compatibility |
RaceFace Cinch system cranks. RF Next SL G4, Next SL, Next R, RF SIXC, RF Turbine, RF Atlas, AEFFECT, RIDE CINCH cranks. |
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Material |
cnc machined 7075 Txxx Aluminum. Long-lasting construction |
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Finish |
Physical Vapour Deposition |
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Chainline |
52mm. 3mm offset |
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Ovality |
Optimized to each size separately. Range: 10.2-14.4% and Timing of 110.5-116.3° after TDC (top dead center) Patent Pending |
Difference between Boost148 and non-boost chainrings is in the offset/dish of the chainring itself only. You would use same crank in both boost and non-boost bikes, but chainring offset has to be different to accommodate chainstay clearance. Boost chainrings have only 3mm offset while non-boost ones 6mm.
If you wish to check for frame clearance with new oval ring, below you can find measurement of biggest dimension of the oval (tip to tip of tooth):
26T: 118mm ; 28T: 127mm ; 30T: 134mm ; 32T: 143mm ; 34T: 151mm ; 36T: 159mm