absoluteBLACK Oval Boost Chainring for SRAM DM / Shimano HG+ 12-speed 3 mm offset

The absoluteBLACK Oval Boost chainring with 3 mm offset for SRAM Direct Mount and Shimano HG+ 12-speed chains

This oval 1-speed chainring by absoluteBLACK for SRAM MTB cranks with Direct Mount and MTB cranks with removable spiders features a 3 mm offset and was specially developed for Shimano 12-speed chains, namely Hyperglide+ chains. It is compatible with Boost bikes with 52 mm chainline and an over locknut dimension of 148 mm and cannot be combined with other chains. It can also be used on Super Boost Plus bikes with a chainline of 56.5 mm and an over locknut dimension of 157 mm. Use it for newer and older SRAM cranks with a GXP, long BB30 or DUB axle, for various Truvativ models as well as Cane Creek eeWings. The chainring is made of premium quality aluminium and features a Narrow-Wide tooth profile that counteracts chain drop. Thanks to the oval shape, you optimise your pedalling movement, reduce the strain on your knees and move forward faster.

Specifications:

Application:

Cross Country, All Mountain, Enduro

Mount:

SRAM Direct Mount

Teeth:

30 T, 32 T, 34 T

Gearing:

1x12-speed

Type:

Oval 10.2 - 14.4 %

Technical Information:

Offset:

3 mm

Chainline:

52 mm (Boost) / 56.5 mm (Super Boost Plus)

Material:

aluminium (7075)

Compatibility:

Cranks:

SRAM XX1, XX1 Eagle, X01, X01 Eagle, GX Eagle, NX Eagle, SX Eagle, X1, X0, X9, X7, S2210, S1400, Super Boost cranks (SB+) / Truvativ Descendant, Stylo, AKA / Cane Creek eeWings

Bottom Bracket:

DUB, GXP, BB30 long axle

Frame:

Boost 148 mm / Super Boost Plus 157 mm

Chain:

only compatible with Shimano 12-speed chains (for Hyperglide+ / HG+), e.g. CN-M9100, CN-M8100, CN-M7100, CN-M6100

Features:

• oval shape for improved traction and performance uphill
• faster, looser riding with a natural pedalling motion with reduced strain on the knees
• ovality and timing (110.5 - 116.3°) matched to chainring size (TDC technology, Top Dead Center)
• excellent weight to stiffness ratio
• special Narrow-Wide tooth profile improves chain retention
• 3D-moulded teeth for better dirt repellency, longer durability and less noise
• thicker and specifically-shaped teeth especially for HG+ 12-speed chains
• weight saving compared to traditional spider-chainring setup
• durable construction, CNC-machined
• anodised
• premium quality and great aesthetic
• designed in Great Britain, manufactured in Poland

Technology:

Oval Chainrings
Oval chainrings follow the natural physiology of humans. They maximise pedalling power the moment it is developed and minimise resistance when it is not. As a result, oval chainrings allow the rider to pedal more smoothly and stay loose on the climb.
In fact, your pedal stroke will feel " rounder" with an oval chainring than with a round chainring.
Compared to round chainrings, oval chainrings address more muscle groups - but each of them to a lesser degree. The total load of pedalling is therefore distributed over a larger muscle mass and the knees are less strained.
This has three advantages: 1. The legs remain fresher and more relaxed. 2. You can go uphill faster. 3. Spreading the load over more muscles reduces the susceptibility to cramps, even with great effort. Ultimately this will increase your riding pleasure. For MTB applications, the rear wheel traction is increased on loose and slippery surfaces, allowing you to make better progress on demanding terrain.

Manufacturer Numbers:

30 tooth:

SROVBSH/30BK

32 tooth:

SROVBSH/32BK

34 tooth:

SROVBSH/34BK

Contents:

• 1 x absoluteBLACK SRAM Direct Mount / Shimano HG+ 12-speed Boost Oval chainring