PREMIUM SUB-COMPACT OVAL 110/5 CHAINRINGS 48/32T
Order ONLY 30+46T OR 32+48T. Don't order spare bolts.
absoluteBLACK introduces premium Gravel - Road 110/4 oval chainrings in Sub-compact (super compact) sizes to improve your climbing and cadence. Increased Cadence is key to reducing perceived effort. With 46/30T and 48/32T chainrings you can ride anywhere and climb anything. Alpine climbs will never be that difficult anymore. These special super compact chainrings are compatible with all Shimano 110/4bcd cranks making absoluteBLACK the only company on the market offering such sizes. 30 and 32T chainrings allow you to climb on your own terms with improved cadence and efficiency. 10/11/12spd compatible. Ready to try?
Size (Mass +/-1g):
30T (27g), 32T (30g), 46T (99g), 48T (110g)
Black, Grey, Champagne (inner ring in black only)
Shimano Dura-Ace 9100, R9120, R9150 & R9170 Di2, Ultegra 8000, R8020, R8050 & 8070 Di2., 105 R7000, R7020, R7070, Dura-Ace 9000, Ultegra 6800, Shimano 105 5800, Tiagra 4700 ; 10 / 11 / 12spd compatible.
Special bolts are included with 30T (2xM5 TI / 2xM7 AL)
Special bolts are included with 32T (4xM7 AL)
Material & Finish
cnc machined 7075 Txxx Aluminum. Long-lasting construction. Type II anodizing
Optimized to each size separately. 30T- 9% ; 32T - 8% ; 46/48T - 10-11.2% ; Timing of 108 -110.5° after TDC (top dead center) - Ideal for climbing. Patent Pending
Due to very special offset construction and custom bolts:
*30T can only work with 46T and special bolt set 46/30. (bolts included with small ring)
*32T can only work with 48T and special bolt set 48/32. (bolts included with small ring)
*No other combination or mix of rings will work. Due to special mounting construction, aesthetic bolt covers are not offered for this design
*We Only recommend Dura-ace 11spd chain or Sram Eagle 12spd chain for proper clearance of mounting tabs
Advantages of Absolute Black sub-compact Oval chainrings:
* 30 and 32T chainrings allow you to climb on your own terms with improved cadence and efficiency
* One of a kind special oval shape that helps you climb easier and faster (Patent Pending)
* No more mashing on long climbs and wishing for bigger cassette.
*Have you ever had to walk the climb on sportive race? These rings will save you from it.
* 46/11 or 48/11 is still a big gear to push on the flat. For your daily ride you most likely don't need more
*Your pedaling will feel smoother
*AB oval reduces stress on knees and helps your legs remain fresher for longer
*You will be able to maintain better cadence while climbing
*Reduces possibility of leg cramps
SPEED AT CADENCE CALCULATION
The absoluteBLACK Sub Compact Oval 46T and 48T rings are large enough to reach comparable flatland speeds as their larger counterparts. This calculation shows gear combinations at 90rpm cadence, and 700c x 25mm tire.
* 46x11T combination is minimally faster than 50x12T. This is 47.5km/h (29.5mph) and is faster than 52x13T! At 100rpm it increases to 53km/h (32.9mph).
* 48x11T combination is minimally faster than 52x12T. This is 49.7km/h (30.9mph) and is faster than 53x13T! At 100rpm it increases to 55km/h (34.3mph).
As seen from the examples above absoluteBLACK Sub Compact Oval Chainrings are more than capable of reaching high top speeds when used with 11T cog. But where absoluteBLACK Sub Compact rings are in a league of their own is the small 30T and 32T chainring. They make climbing easier and exceptionally comfortable, but still retain high top speeds with 46T and 48T big chainring.
What size should I choose?
* 46/30T is best for great gravel adventures where lots of climbing is involved and bike is packed with gear. Or simply for you to actually enjoy road climbs like Sa Calobra in Majorca or Alpe d'Huez in France
* 48/32T is ideal for general road climbing and day to day riding. Planning L'Étape du Tour? This size is right for you (30T would be too slow).
How to mount super compact 46/30T & 48/32T 110/4 Oval chainrings:
First, you need to remove your crank from your bike. Once removed, unscrew the 4 bolts that hold two chainrings together with a T-30 torx key. Remove both original rings.
for 46/30T - Start by placing big chainring on the crank. There is only one way to do it. Next locate triangular mark on inner circumference on the small chainring and make sure it will sit behind the crank. Small chainring has also integrated spacers on one side. Those spacers need to enter into the crank mounting holes. 30T chainring is provided with 2x M5 bolts (Torx T-25) and 2x M7 bolts (torx T-30). Lock both chainrings in place using provided bolts and torque M5 to 4-5Nm and M7 to 5-7Nm.
for 48/32T - Same procedure applies except that 32T chainring comes with 4x M7 bolts (torx T-30) .
How to adjust front derailleur with absluteBLACK sub compact 46/30T chainrings:
How to adjust front derailleur with absluteBLACK sub compact 48/32T chainrings:
Absolute Black always recommends using a new chain when fitting new chainrings.
This ground breaking construction has patents pending in several countries around the World.
|MSRP: from £67 ......||
All Absolute Black products are designed in UK and manufactured in Poland (EU) to the highest standards of quality.
Why our oval chainrings work
Our premium Oval chainrings work because riders do not produce power evenly through a pedal stroke –the musculature of human legs makes it difficult to maintain an even power delivery to a round chainring. Believe it (or not), but a round chainring doesn't transfer torque to your rear wheel as smoothly as an Oval one. Oval rings work with the natural human physiology. Oval chainrings maximize the part of the stroke where power is produced and minimize resistance where it isn't. As a direct consequence, Oval rings enhance a cyclist’s ability to spin with a smoother power delivery and feel easier on legs while climbing. You will actually feel your pedal stroke to be more "round" with an Oval chainring than with a round chainring.
Why using AbsoluteBlack oval chainrings matters
Absolute Black oval road chainrings deliver power more smoothly to your rear wheel. This means you are better able to generate and maintain, constant cadence. Because oval chainrings reduce the peak loads on knee joints, riders using them get less stress on the joints (knees) and therefore are able to keep certain level of effort for longer. This results in higher average speed. You don’t need to take our word at Absolute Black; 11 scientific studies by leading universities around the globe show that; in comparison to round chainrings, when using oval chainrings, human legs utilize more muscle groups - but each of them to lesser degree. The overall Load from pedalling an oval chainring is spread over greater muscle mass. This has three key benefits; firstly, it gives you the feeling of fresher and more relaxed legs. Secondly; it allows you to achieve higher average speed riding uphill. Thirdly; spreading the pedalling load over more muscles reduces the risk of cramp, even when riding hard. The compound effect of switching to oval chainrings; the relaxed legs, added climbing ability and reduction of cramp means your overall enjoyment of the ride is enhanced.
Word on BIOPACE - Please understand Absolute Black’s oval design IS NOT ‘Biopace’ technology. Shimano created their non-round Biopace chainrings with a completely different orientation of the biggest radius of the oval. Their ring orientation has since been widely accepted as being fundamentally wrong. Instead of positioning it in power zone - which is slightly below the level of the crank - they clocked it to the dead zone where human physiology generates least power. The result was that in power zone pedalling was too easy and in dead zone too hard, causing knee pain and lumpy pedalling cadence. Exactly opposite to how it should be. The opposite of how it is with an Absolute Black oval chainring fitted to your bike.
Cranks visible on the photos are not included to the purchased chainrings.