Cannondale Hollowgram Si Carbon Clincher Wheelset

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10+ in stock, ready to dispatch.

UK and EU delivery available.

Available for Reserve & Collect.

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Stay strong, efficient and keep performing at your peak with the Cannondale Hollowgram Si Carbon Clincher Wheelset. Constructed with the same Hollowgram technology as Cannondale use in their crank arms, this wheelset is incredibly strong, rigid and weighs a sublime 1480g for the pair.

Cannondale Hollowgram Si Carbon Clincher Wheelset

Bridging the gap between efficiency and performance, the Cannondale Hollowgram Si Carbon Clincher Wheelset weighs an impressive 1480g (without quick releases), offering next level stiffness, efficiency and braking predictability for an all-round ideal wheelset for the price.

At 35mm deep, the rims of the Hollowgram Si Wheelset sit beautifully inbetween aerodynamic and responsive, offering the handling of shallow depth rims but cutting through the wind like a hot knife through butter for a much more enjoyable ride. The rims have also been signed off by tubeless system masters, Stan’s NoTubes, and ensures puncture protection of the highest quality.

Aesthetically, these wheels are subtly emblazoned with Cannondale logo’s that offer that stealth look you yearn for when out on the bike.


  • 1 x Cannondale Hollowgram Si Carbon Clincher Wheelset
  • 2 x quick release skewers

Please note:

You will need a pair of carbon brake pads with this wheelset.

The manufacturer does not recommend using latex inner tubes with carbon clincher wheels. Using latex tubes may void your warranty.

  • Full carbon clincher
  • Tubeless ready
  • Cannondale branded hubs
  • Rim depth: 35mm
  • Weight: 660g (front) 830g (rear) 1480g for the pair (actual, without skewers)
  • Hubs: HollowGram 24t/3-pawl freehub for fast engagement, sealed precision bearings
  • Shimano/SRAM 9, 10 and 11-speed compatible
  • Please note: wheels have a rider weight limit of 125kgs


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

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 is 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 is 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.

* 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.

** 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.

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 and Returns

We ship to over 100 countries using DHL for a fast and reliable delivery. To see the delivery cost, please add your items to the basket and proceed to the checkout.

International customers have 30 days from their order date to return the order. Goods must be returned in new condition with all original packaging intact 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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