Rotor INpower Flow MAS Crankset

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2 in stock, ready to dispatch.

UK and EU delivery available.

Available for Reserve & Collect.

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Take your pedalling to the next level with the Rotor INpower Flow MAS Crankset. With a top-end CNC aluminium construction and the next-level Computer Fluid Optics design, this crankset is incredibly aerodynamic and rigid. The integration of Rotor's superb INpower meter into the bottom bracket means that you can train smart too.

Rotor INpower Flow MAS Crankset

Train with power and save valuable watts with the Rotor INpower Flow MAS Crankset. The inclusion of the INpower meter means that you can gain an accurate and lasting picture of your power through the entire pedal stroke. Utilising an ANT+ signal and a single AA battery for power, INpower cranks are compatible with any ANT+ enabled bike computer.

The crankset's aero shape has been specifically designed from a purely functional perspective in performance and not just aesthetics using the Computer Fluid Dynamics (CFD) Design. CFD is a software program that can simulate an actual wind tunnel test and allows Rotor to isolate a specific part of the bicycle in motion. The rigidity of the Rotor Flow is not compromised, as it is 10% stiffer than most aero cranks on the market.

The aero profile of the crank arms has been optimised according to the varying airflow the crank encounters from the axle to the pedals, throughout the 360° pedal stroke. The crank arms and the spider are designed separately in order to acquire a maximum advantage of the crank’s aero profile.

The crank arms of the Rotor Flow are made of 100% CNC machined, 7075 T6 aluminium, which has been trinity drilled for a further weight reduction. Rotor's axle systems has been specifically developed for multiple BB systems. In addition Rotor has extended the compatibility of the Flow, as now it's featuring an improved ultra stiff 30mm aluminium UBB axle.

The "UBB System" allows the installation of almost any 24 or 30mm Rotor axle crank on your bike, regardless of its BB type.

Furthermore, this crankset is equipped with the "MAS" (Micro Adjust Spider). This technology allows more options for a further optimised Q-Ring setup. MAS spiders have a secondary set of bolt holes that allow Q-Ring users to regulate their Q's with more accuracy by offering half increments between the normal "Optimum Chainring Position" settings.

This crank is manufactured using an improved version of Rotor´s proprietary "Trinity Drilling System" technology. Due to the larger axle-crank contact area of a BB30 crank, all three holes can be drilled from the axle side of the crank arm, allowing further optimisation of wall thicknesses. It improves both the weight and the weight-rigidity ratio of the crank arm.

  • Material: 7075 T6 aluminium
  • Weight: approx. 614 grams (at 170mm crank arm length, without BB and chainrings) (manufacturer's specs)
  • Included: crank, without bottom bracket, without chainrings, with aluminium chainring bolts, spacer
  • Fitting for derailleur: 2x10/11-speed Shimano/SRAM
  • Chainline: 43.5mm
  • Axle profile: Integrated 30mm aluminium axle
  • Bolt Circle: 130mm
  • Q-Factor: 148mm
  • ANT+ compatible
  • AA battery for charge (sold separately)
  • Available in 130 or 110 BCD


UK Delivery Options

Free Delivery on all orders over £30

Estimated delivery within 4 working days (a delivery charge of £1.99 for orders under £30.00 will apply)

CollectPlus Delivery - £1.99

Have your order delivered to your local shop for just £1.99! For Highlands and Islands, please allow up to 5 working days. Orders can be shipped to UK CollectPlus locations specified on the website where they will be held awaiting collection for a period of 10 days.

Orders placed are normally dispatched within 2 working days.

Priority 1st Class Delivery - £2.99

Estimated delivery within 2 working days.

Next Working Day Delivery* - £4.99

A guaranteed tracked courier delivery, place your order before 3pm, deliveries are made Monday to Friday.

Saturday pre 12 Delivery - £4.99

Saturday delivery orders must be placed by 1pm Friday and are only available on items in stock in our warehouse. Orders are prioritised through our warehouse and are delivered on Saturday pre 12pm by courier. Package must be signed for upon delivery.

Sunday pre 12 Delivery - £4.99

Sunday delivery orders must be placed by 1pm Friday and are only available on items in stock in our warehouse. Orders are prioritised through our warehouse and are delivered on Sunday pre 12pm by courier. Package must be signed for upon delivery.

Reserve and Collect** - FREE

Reserve & Collect is available on all items marked 'Collection'. It is a FREE delivery option that allows you to collect your order from either our Sigma Sport Store, Hampton Wick or our Reserve & Collect location in Esher. Just select the Reserve & Collect button in the basket.

** Reserve and Collect Collections - Clothing, parts and accessories: Next day. Orders placed on Friday, Saturday or Sunday will be available for collection after midday on the Monday (excluding Bank Holidays). Bikes: 4 days if in stock at store, collect in up to 7 days (sometimes quicker) if in stock at warehouse.

* Next Working Day delivery is only available on items in stock in our warehouse and excludes pre- order items. Next Day refers to the next working day, Bank Holidays will add an extra working day to the estimated delivery lead times. UK next day excludes Saturday deliveries. This service is not available to some remote postcode areas. Please contact us for help.

London Same Day (Order Before 1pm)

We offer a Same Day delivery service into London. The cost is £25.00 under 2Kg and £35 over 2Kg. Place your order before 1pm, deliveries are made Monday to Friday. Please note this option excludes bicycles.

More information on our Same Day delivery options.

Bike Deliveries

All our bikes are fully checked and tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for despatch. All you have to do is add the pedals, rotate and tighten the handlebars. Typically we can deliver your bike in 4 - 5 working days.

Deliveries are made Monday to Friday on a pre-12pm delivery. One of our customer service team will be in contact to arrange a convenient day for delivery.

More information on all our UK delivery options.

International Delivery

We ship to over 100 countries using Tracked Post or DHL for fast and reliable deliveries. To see delivery options and delivery times, please add your items to the basket and proceed to the checkout.

International customers have 30 days from their order date to return your order. Goods must be returned in new condition with all original packaging intact, undamaged and tags attached. For full details, see this link.

Free UK Returns

We offer a free returns service for our UK customers. Sigma Sport will happily refund or exchange any item purchased at Sigma Sport, excluding Sigma Sport gift vouchers and personalised products except when faulty.

More information on the Sigma Sport returns procedure.

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