absoluteBLACK Oval Road 110/4 Chainring for Shimano Dura-Ace 9000 / Ultegra 6800 - black/50 tooth

absoluteBLACK Oval Road 110/4 Chainring for Shimano Dura-Ace 9000 / Ultegra 6800

Item number: 58907
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The absoluteBLACK Oval Road 110/4 chainring for Shimano Dura-Ace 9000 and other 4-arm cranks


This oval 2-speed chainring by absoluteBLACK was developed for the Shimano Dura-Ace 9000 and Ultegra 6800 road bike cranks, which have four asymmetrically arranged arms and a bolt circle diameter of 110 mm. It also fits 105 5800 and Tiagra 4700. The chainring is designed for super-fast and smooth shifting. It is made of premium quality aluminium and is characterised by particular rigidity. Thanks to the oval shape, you optimise your pedalling movement, reduce the strain on your knees and move forward faster.

Specifications:

Application:
Road
Mount:
110 mm bolt circle diameter, 4-arm asymmetrical
Teeth:
34 T, 36 T, 38 T, 50 T, 52 T
Gearing:
2x10-speed, 2x11-speed
Type:
Oval 6.5% (34 T), 11.4% (36/38 T), 10.3% (50/52 T)

Technical Information:

Combinations:
34-50 T, 36-52 T, 38-54 T
Material:
aluminium (7075)

Compatibility:

Crank:
Shimano Dura-Ace 9000 / Ultegra 6800 / 105 5800 / Tiagra 4700 (also Di2 groupsets), compatible with Pioneer, SRM and other power meters
Chain:
10-speed or 11-speed

Note from the manufacturer:

The 34 T chainring is not compatible with power meters that have a circular spider (e.g. SRAM QUARQ, Power2Max). Use long bolts or bolt covers for the outer chainring. If you are only replacing the inner chainring, continue to use the original bolts.

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 (108 - 109.5°) matched to chainring size (TDC technology, Top Dead Center)
  • 15% less shifting operations needed
  • 5 mm thick and 15% stiffer than comparable chainrings
  • 6 shift ramps, 12 downshifting points and design with cutouts for fast, smooth shifting
  • excellent weight to stiffness ratio
  • durable construction, CNC-machined
  • anodised
  • premium quality
  • 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:

black 34 tooth:
ROV34/4BK
black 36 tooth:
ROV36/4BK
black 38 tooth:
ROV38/4BK
black 50 tooth:
ROV50/4BK
black 52 tooth:
ROV52/4BK
grey 50 tooth:
ROV50/4GR
grey 52 tooth:
ROV52/4GR

Contents:

  • 1 x absoluteBLACK Road 110/4 BCD Shimano Dura-Ace 9000 Oval chainring

Order Together:



Weight:

  • black/34 tooth: 31 g
  • black/38 tooth: 41 g
  • black/50 tooth: 120 g
  • black/52 tooth: 137 g
  • 100 day return period
  • Online since 1998
  • Trusted Shop 4.84 / 5.00

Models:

  • black/34 tooth, in stock
    51.92€
  • black/38 tooth, in stock
    26.82€
  • black/50 tooth, in stock
    112.51€
  • black/52 tooth, in stock
    58.85€
  • grey/50 tooth, in stock
    112.51€
  • grey/52 tooth, in stock
    58.85€

Customer Reviews (1)

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Customer Reviews (1)

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Give us your opinion on this product.

by Jakob B. on 29.05.2019
verified purchase
item: black/36 tooth

Ich gebe meine persönliche Erfahrung wieder. Einige MTBler - die kurze Anstiege an der Kraftgrenze fahren - und Triathleten - die laufen aber auch im Anschluss - schwören drauf. Ich nicht.
Ich habe mir das kleine Blatt oval gegönnt. Als trainierter Radsportler war das Blatt oberhalb 70/75 rpm mit ruckeligem Vortrieb verbunden was echt genervt hat, außer ich habe mich drauf eingelassen und absichtlich "gestampft". Das ging dann bis 90 rpm, aber weder mit Kraft- noch mit Ausdauergewinn (Powermeter). Auch bei niedriger Kadenz für mich keine Vorteile. Insgesamt ca. 700+ km gefahren, dann wieder zurück auf normalrund.
Aber 3 Sterne weil eine günstige Möglichkeit die Technik zu testen.

Is this review helpful?
Response from bike-components on 06.09.2019:

Ovale Blätter muss man tatsächlich selbst probiert haben, um sich ein Urteil zu bilden, das ist absolut korrekt.

Viele Kunden und auch einige Kollegen loben den gefühlt runderen Tritt sowohl am MTB als auch am Rennrad, und wollen nicht mehr zurück.

Es kommt aber immer auch auf die persönliche Präferenz und Tritttechnik an. Eine gewisse Eingewöhnung sollte man auf jeden Fall einrechnen, 700 km sind da aber schon reichlich.

Für ein gleichmäßiges Ergebnis ist es zu empfehlen, beide Blätter zu tauschen, da sich sonst mit jedem Schaltvorgang vorn das Tretgefühl ändert, was tatsächlich stören kann.

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