The Ultimate Bicycle Components



We specialize in manufacturing of performance enhancing bicycle components that change the way you ride.


SHOP PRODUCTS


The only scientifically proven oval chainrings on the market. Our studies led by the University of Primorska, Slovenia show significant differences when using absoluteBLACK Oval chainrings compared to round. Up to 9% increase of pedaling effectiveness, up to 7% less oxygen consumption, up to 15% less Ventilation (breathing) and up to 10% heart rate decrease when using oval chainrings versus round.



What does that mean? In short, it means that you will consume less energy at the same power output using Oval chainrings so you can ride for longer and/or faster. Our data show that the higher you climb the more effort you have to put in, therefore it's important to maximize efficiency and effectiveness and you can improve both by using oval chainrings.





Designed in England, manufactured in EU using German materials. Truly European products.



AS SEEN ON


Share your Oval chainring photos with us on Instagram: #OvalThis #absoluteBLACK #OVALREVOLUTION

absoluteblack Bolts
absoluteblack Bolts
absoluteblack Bolts
absoluteblack Bolts

Premium chainring Bolts


$19.50
Variant : 4 LongSize Guide
4 Long4 Short5 Long5 Short
Availability

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Single and Double chainring bolts to mount Absoluteblack chainrings to the crank arms. Bolts have torx T30 interface for greater reliability.

Size (Mass +/-1g):

set of 4 (6,2g), set of 5 (7,9g)

Color

Black

Key required

Torx T30

Material

cnc machined 7075

Finish

type II anodizing
Which bolts should you order

"SHORT" for:

*104bcd Oval 34 / 36T

*104bcd round 32 / 34 / 36 / 38T

*bashring


"LONG" for:

* 110/4 & 110/5 bcd for outer+inner ROAD Oval chainrings

* 130/5 bcd for outer+inner ROAD Oval chainrings

* 104bcd Oval 26 / 28 / 32T

* 64bcd round 26 / 28 / 30T 

* all CX ROUND rings 


IMPORTANT

*You MUST use medium strength thread locker on the bolt threads. (for eg. Loctite 243)

*Recommended torque for the bolts is 5-7Nm

* For 30T 104bcd - bolts are included in the price of chainring already.

* For ALL OVAL CX /Gravel 1X 110/5 and 110/4bcd chainrings - bolts are included in the price of chainring already.

* For XT M8000 - bolts are included in the price of chainring.

* For XTR M9000 - use original Shimano bolts that come with crank.

* For Sram Road Oval chainrings - use original Sram bolts that come with crank.

* If you change Road inner oval chainring only and keep outer as round - use original bolts.


Important note for CX Round ring users only

Sometimes there may be a need to file down female nuts to achieve proper fit. This is because each crank has tabs of different thickness and it is not possible to make "one fit all" solution. Bolts itself are fine.

MTB users will not have to do any modifications to bolts or nuts. 


Designed in UK