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CROOTHTH
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49 Reviews

High-quality alloy chainrings for single-ring mountain bike use with an thick-thin tooth profile to help prevent chain drop.

  • Single-ring anti-drop mountain bike chainrings
  • CNC machined from 7075-T6 alloy
  • Available in 30T, 32T or 34T
  • 104mm BCD, 90mm ID
  • 7, 8, 9, and 10-speed compatible

Full Description
From £19.99

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Summary

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32t / Black
4 in stock £19.99
34t / Black
15 in stock £19.99

With availability of big cassettes now as wide as their gear ratios, single-ring mountain bike set-ups are gaining more and more ground these days and with good reason: they provide almost as much gearing as their double ring cousins but are lighter, more reliable and less expensive. The On-One Ringmaster now provides the perfect chainring to complement a single-ring build.

Available in either 30T, 32T or 34T, the Ringmaster is CNC milled from 7075-T6 alloy and weighs in at 61g, 63g and 73g respectively on our scales. Thick-thin tooth profiling prevents chain drops without the need for a chain device, further reducing weight and increasing pedalling efficiency as well as limiting chain wear. A 104mm BCD (bolt circle diameter) makes the rings compatible with a wide range of cranksets.

  • Single-ring anti-drop mountain bike chainrings
  • CNC machined from 7075-T6 alloy
  • Available in 30T, 32T or 34T
  • 104mm BCD, 90mm ID
  • 7, 8, 9, 10-speed compatible

Additional Information

Product Code:CROOTHTH

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Reviews

  •   Feefo Reviewer
    •  1
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    •  5

    Recommended to fit this chainring to a nine speed block. No need for chain guide, and works without issues and is well made.

  •   Feefo Reviewer
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    •  4
    •  5

    Same as above.

  •   Feefo Reviewer
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    •  5

    Almost half the price of any others I found online and it hasn't dropped my chain in 2 weeks of commuting so good so far

  •   Feefo Reviewer
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    •  5

    I think a good product at a reasonable price

  •   Feefo Reviewer
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    •  5

    Further to my previous review, seems to do the job! No loss of chain or chain suck so far!

  •   Feefo Reviewer
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    •  4
    •  5

    Perfect, as descripted

  •   Feefo Reviewer
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    •  5

    Described as ok with 7,8,9 and 10 speed drivechains. Original SRAM chain suffered chain suck and brand new chain won't sit over the fat teeth. Will be calling to get it swapped out.

  •   Feefo Reviewer
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    •  4
    •  5

    As Above

  •   Feefo Reviewer
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    •  5

    great value, love the NW rings, super value