#chainsets

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[merlincyclesuk]

What makes a good chainset? Which chainsets aren’t suitable for you and your riding? What options are worth considering? All these cranky questions are answered in this guide. Chainsets, or cranksets, are the front section of the drivetrain and although they all look similar and perform the same function, they can be bewilderingly different on closer inspection. Crank length, number of rings, number of teeth, bottom bracket system and manufacturer compatibility and so on.

[cycletechreview]

  TURN Zayante M30 Chainset

  Mark Tearle

  A preview of the TURN Zayante M30 Chainset along with the Praxis Works LevaTime chainrings and M30 Bottom Bracket

  The TURN brand evolved from Praxis Works, the drivetrain focused company known for its cold forged chainrings and conversion bottom bracket. Over the years, TURN was progressed by Praxis Works’ customers repeatedly requesting a full crankset that utilised the Praxis rings and bottom bracket systems. Courtesy of UK distributor, Upgrade Bikes, CycleTechReview.com are taking a close look at the TURN Zayante M30 130BCD cranks, fitted with 53/39 Praxis Works LevaTime chainrings and the M30 Praxis Works Bottom Bracket…

  TURN Cranks with Praxis Works LevaTime chainrings

  Turn have two products in their range, the Girder M30 for MTB and the Zayante M30 for road and cyclocross that we have in for review. The Zayante hollow forged, aluminium crankset has been named after a famous redwood covered road in Santa Cruz, California, and forms an integrated drivetrain system by working with Praxis’ forged chain rings and their M30 BB system.

  The crank arms are made using a unique hollow forging process, aligning the grain of the metal under massive pressure, producing ‘a light weight, tougher, and more durable crank than others in the market’ according to TURN.

  Hollow forged crank arms

  The Zayante M30 cranks are available with either forged 110BCD or 130BCD five arm spider options; the 110BCD is compatible with 46/36, 50/34, 52/36 chainrings and the 130BCD with 53/39. Crank arms are available in 170, 172.5 and 175 lengths and it will reportedly work well with Shimano 10/11 speed, Campagnolo 10/11 speed and SRAM 10/11 speed groupsets.   This may all seem normal, even traditional but the clever part is that the spindle is 30mm, yet wider than traditional BB30, aiming to combine the benefits of the extra stiffness provided by a 30mm aluminum spindle and the wide bearing stance of BB86, in a similar but more adaptable way to BB386.   TURN say, “Add in beautifully sculpted, hollow forged crank arms and you have a massive amount of stiffness and power transfer. Praxis Works cold forged chainrings and M30 bottom brackets round out the Zayante package for what is a very versatile road crank with superior shifting.”

  Turn Crank arm

  Obviously you need a special bottom bracket to make this chainset work, and the clever Praxis Works M30 Bottom Bracket is compatible with frames that have a variety of bottom bracket ‘standards': BSA, BB86, BB30, PF30, and ’10-13 Specialized OSBB frames. The M30 BB has forged and machined heat-treated 7075 T6 AL Cups and steel cartridge bearings available in a 68mm road version or a 73mm MTB version.   For installing the Zayante chainset into either BB30, PF30, or Specialized OSBB frames, the cartridge bearings are sited outboard of the frame, similar to with a BSA bottom bracket, for greater rigidity but also to keep free of frame and c-clip tolerance issues that other systems have to deal with.

  M30 bottom bracket

  Praxis Works LevaTime chainrings are well established. All Praxis chainrings are created using a proprietary forging process which gives them the ability to manipulate the ring shape and tooth profile.  This “One-Shot” forging increases the amount of shifting features on a chainring which normal CNC manufacturing won’t allow. The process also creates a harder and tougher tooth surface for extra durability. Individual tooth profiles, alternating tooth angles, timed ramps and tactically placed shift elevators are all jam packed onto a Praxis ring.

  53/39 LevaTime Cold Forged Chainrings – teeth detail

  With the new cranks, chainrings and BB fitted to my bike, I am looking forward to getting out in the lanes to test them out. Full review to follow as soon as I’ve got some road time out of them…

  Turn – Zayante 130BCD 172.5 53/39 – £239.99

  Praxis – M30 68 – £59.99

  Praxis Works   TURN   upgradebikes.co.uk

  [rps-include blog=127.0.0.1 post=29548]    

TURN Zayante M30 Chainset TURN Zayante M30 Chainset Mark Tearle A preview of the TURN Zayante M30 Chainset along with the Praxis Works LevaTime chainrings and M30 Bottom Bracket…