Stans Notubes Rear Wheel Grail MK3 Pro 700C

  • £300.00
Item in Stock | Usually dispatched within 3-5 days
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Ride without limits. Pavement, gravel, cyclocross, and even singletrack: the Grail MK3 is ready to outperform the competition on every surface. Stan’s tubeless technology offers less rolling resistance, more control, and the ability to seal most punctures almost instantly while you keep riding. The Grail’s versatile BST-R rim design makes it compatible with tubeless road tires, low-pressure tubeless converted tires, and conventional tires and tubes, offering maximum flexibility in a single wheelset. Upgrade your bike to the leading tubeless rim design, and find out what you’ve been missing.

The Grail MK3’s internal width and patented Bead Socket Technology rim design are optimized for 25-40mm tires. The truth is out that wider is faster, and the rim shape of the Grail MK3 lets you get the most speed from your tires, while also improving tire stability at speed and control in the corners. Nothing beats Stan’s patented tubeless rim design for getting the most performance from your tires.

All the advantages the Grail MK3 offers on the road are even more noticeable once the pavement ends. For cyclocross and gravel racing, the optimized tire shape and added stability offer a distinct advantage. The Grail MK3’s rim shape is even designed to avoid tire pinch flats, allowing ‘cross and gravel racers to run lower pressures that absorb impacts and improve traction.

For peace of mind on longer rides, the Grail MK3 offers outstanding reliability. Nobody likes flats. Combined with Stan’s sealant, tubeless tires have the ability to seal punctures while you keep riding, adding a new level of security and convenience. Constructed from lighter, stronger 6069 series aluminum, the Grail MK3 rim is also strong enough for serious adventure on and off the pavement. With triple freehub bearings, co-molded seals, and full CNC machined bodies, the Grail’s Neo Durasync hubs are ready for high mileage in all conditions. Laced with traditional and readily available j-bend Sapim spokes, the Grail MK3 is built to be the only wheelset you need for anywhere the ride takes you.

Fast, tough, and featuring the most trusted tubeless technology in the world, the Grail MK3 is ready to improve every ride, both on and off the pavement. Find out just what your bike can do with a Grail MK3 wheelset.

Note: Fork and hub damage can result from improper end cap use. Many road, gravel, and cyclocross forks use 12mm end caps. Our wheels ship with 15mm end caps installed and include separate 12mm end caps. Please confirm what end caps are needed for your bike and swap if necessary. If you’ve ridden your bicycle with improper end caps installed, please have it inspected by a professional mechanic before continued use.

What’s Included:
Grail MK3 wheels come with yellow tape and 44mm tubeless valves installed. Front wheels ship with 15x100mm TA end caps installed, but also include 12x100mm TA end caps. Rear wheels ship with 12x142mm TA end caps installed.

We hope that you find our website easy to use but if you do have any questions at all please feel free to call our sales team on 0208 508 0682 or email info@tritoncycles.co.uk for advice.

Payment - We accept most major credit and debit cards through our secure payment provider Sagepay. All transactions are 100% secure so you may shop with confidence that your details are safe.

0% finance available on selected bikes. Spread the cost of your new bike over 6-36 months. Min. 10% deposit. Terms and Conditions apply.

We also accept Cyclescheme vouchers, for details of how to place an order with a voucher please click here.

All purchases and refunds will be processed in Sterling (GBP). We are not liable for any currency fluctuations. Please be aware that this may result in your refund being less or more than what you originally paid in your local currency.

Standard Business Hours
Monday - Friday: 09:00 - 17:00


Most Saturday: 09:00 - 12:00 (By appointment only. Please call in advance to organise.)

Sunday: Closed

Impact of COVID-19 on Delivery
We are monitoring the impact of the COVID-19 coronavirus around the world. We are in constant contact with our couriers on any potential service impacts. Deliveries may experience a delay with the couriers.


Free Delivery -
 Delivery is free on most orders over £30.00, with delivery starting from £4.95 for orders below this value. There are surcharges for international deliveries, off-shore deliveries and some areas of the UK. Postcodes that are considered to be remote or offshore are as follows: AB36-38, AB55-56, FK17-21, IV1-39, IV52-54, IV63, KW1-14, PA21-40, PH19-40, PH30-41, PH49-50, HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3. Accurate delivery costs will be provided at checkout where applicable. Our dispatch time for in-stock items is usually 24-48 hours and delivery typically takes a further 3-5 working days. Please ensure you select the correct delivery options to display the correct postage cost to avoid any delay on your order. Not selecting the correct options may incur additional charges (Please see 'Courier Selection' for more information).

Some wheels are excluded from the free delivery promotion.

Bikes - All bikes are checked in our workshop prior to dispatch. Bike orders are typically dispatched within 48 hours of your order. Please note - most bikes are delivered partially assembled - this varies from model to model, please call to confirm what building is required prior to ordering.

Delivery for International Orders - Please note, all international orders, including countries within the EU are sold exclusive of VAT but may be subject to import duties and taxes, which may be levied once a shipment reaches your country. For details of current customs charges please contact your local Customs authorities. UK VAT is not charged for orders delivered outside of the UK.

RUSSIAN FEDERATION ONLY - We are not allowed to deliver to residential addresses. Russian Customs will reject the parcel and it will be returned to us. Please provide a business delivery address on all orders. We are not able to check the address of every order therefore any orders with a residential address will incur additional delivery charges if it is returned back to us by the Russian Customs.

Is your country not listed on our website? Feel free to get in contact with us and we will quote you a price! Message us on our Contact Us page and make sure to include your postal code/zip code. We will not be able to deliver to PO BOX and BFPO addresses.

We will always try our best to meet agreed delivery times, however we cannot guarantee them due to third party couriers or workshop load. We shall not be liable for any consequential losses due to delayed delivery times.

Courier Selection - Choosing the incorrect shipping option for your country/location may cause delays as we may have to amend the order and apply any additional shipping fees. Any order cancellations due to a refusal to pay the correct shipping fees may incur additional processing charges.

Billing & Delivery Addresses - Please ensure your billing & delivery address is correct when placing your order. We will do our best to ensure that all our customers receive their order but we are not responsible for any mis-delivery if the delivery address is incorrect.

Stock Check - The majority of our products are usually in stock and we try to keep our stock levels as up-to-date and as accurate as possible. However sometimes our system may not be updated in time and a product may be out of stock despite the product page showing it as 'In Stock'. If you are interested in a product and would like to double check the availability of it, please feel free to contact us before placing your order.

Dispatched Dates/Due in Dates (Pre-orders) - We try to provide as accurate as possible information on the arrival of our pre-order products. The dispatched dates/due in dates shown are an estimate of when the products will be available as provided by our suppliers. The dispatched dates/due in dates are subject to change. We will do our best to keep our customers updated.

At Triton Cycles we aim to provide a returns service that is simple and hassle-free.

Should you need to return anything to us, it is very important that you telephone us first to advise us of your intention and the reason why you wish to return the goods. If you're not completely satisfied with an item you may return it within 14 days of purchase, and as long as the item isn't fitted or used we're happy to receive it back for a refund or exchange. Return shipping costs in this instance are non-refundable.

If the item is being returned as a result of our error i.e. damaged, defective, wrong item sent etc, we will refund Royal Mail First Class or Standard Parcel postage costs. If this is the case please include a copy of your purchase receipt when you return the goods for inspection. Please DO NOT sign for goods if you think that they are damaged, or the packaging has been tampered with. Instead, refuse to accept the delivery and contact us immediately(within 3 working days) so that we can take the matter up with our courier. Replacements will be sent to you as soon as possible. Signing for goods later found to be unacceptably damaged in transit complicates negotiations with the courier in dealing with your complaint. However, if a minor component is missing or broken(e.g. a reflector) please DO NOT return the whole bike. Simply contact us and we will replace the part as soon as possible. Please DO NOT discard any original packaging until you are fully satisfied with your purchase. Should you need to return a bicycle, couriers will not transport a machine not in the original or suitable packaging. Warranty Claims: All goods purchased from Triton are covered by a full warranty and generally covers manufacturing faults and defects including poor workmanship. If you think your item is faulty and would like to make a warranty claim then please phone/email us before returning any goods - we may be able to solve your problem without you incurring any postage costs.

All purchases and refunds will be processed in Sterling (GBP). We are not liable for any currency fluctuations. Please be aware that this may result in your refund being less or more than what you originally paid in your local currency.

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