RENTHAL - SR4 4-ARM 104BCD CHAINRING - REVIEW - Ride UK BMX

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RENTHAL – SR4 4-ARM 104BCD CHAINRING – REVIEW

The trusted chainring of the British Cycling BMX Squad

The only chainrings the British Cycling BMX Squad uses, the Renthal chainrings are precision CNC machined to extremely tight tolerances to give the ultimate combination of strength and light weight. The 7075 T6 aluminium alloy chainwheels are 66% lighter than steel, yet incredibly durable.

“Renthals combination of a very high strength base material and an exceptionally hardwearing surface result in significantly increased chainwheel life make them the choice of the British Cycling BMX Race Squad.”

Their advanced tooth profile, concentricity and accuracy of fit provide maximum power transfer and long-life. Renthals combination of a very high strength base material and an exceptionally hardwearing surface result in significantly increased chainwring life. The 5mm thick Ultralite™ chainring uses an I-Beam section tooth support bed, for the highest possible stiffness at the lowest possible weight. CNC machined from 7075 T6 aluminium, the hard anodised surface treatment massively increases the lifespan of the chainring. Tooth size from 32t right up to 44t are available. Sizes 41t through 44t have a centralised tooth bed, for better chain line when used on a BMX race bike.

  • Computer aided Ultralite™ design enables the ultimate combination of strength and
  • lightness.
  • High strength 7075-T6 aluminum alloy provides excellent durability.
  • Slightly offset toothbed on size 32-40t, for chain device compatibility.
  • Hard anodised surface coating for increased longevity.
  • Precision CNC machined to extremely tight tolerances.
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