To improve your shopping experience today and in the future, this site uses cookies.
I Accept Cookies
The Hard Charging All-Rounder
The Hard Charging All-Rounder
Transition

2021 Transition Sentinel Carbon XT Full-Suspension Mountain Bike - Grey

£5,499.95
Earn
in Customer Rewards when you buy this item today
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
Earn Rewards
When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

Hassle free returns - please contact us if you need to return any item.

Refund Policy

Last updated: 10 August 2026

This Refund Policy explains when customers of Drover Cycles may cancel an order, return goods or receive a refund.

Drover Cycles is operated by Drover Cycles (Hay on Wye) Ltd, registered in England and Wales under company number 16125118.

Nothing in this policy affects your statutory rights.

Online purchases – changing your mind

If you are a consumer purchasing goods online or by another distance-selling method, you will normally have a legal right to cancel your order within 14 days after the day on which you receive the goods, subject to certain exceptions.

You must tell us that you wish to cancel within that 14-day period.

You then normally have a further 14 days to return the goods to us.

You are responsible for the cost of returning unwanted goods unless we agree otherwise or the goods are faulty, damaged or incorrectly supplied.

If you cancel the whole order under your statutory cancellation right, we will refund the standard delivery charge you paid to receive the goods. If you selected a more expensive delivery method, we are not required to refund the additional cost above our standard delivery option.

We may reduce a refund where goods have been handled beyond what would reasonably be necessary to establish their nature, characteristics and functioning.

Some products are excluded from statutory cancellation rights, including certain personalised or made-to-order goods, sealed goods which are not suitable for return for health or hygiene reasons once unsealed, and other goods excluded by law.

Our 30-day returns policy

In addition to your statutory rights, we offer a 30-day returns period for most unused goods.

If you change your mind, you may return eligible goods within 30 days of receiving them provided they are:

  • unused;
  • in resalable condition;
  • complete with all supplied parts and accessories; and
  • where reasonably applicable, in their original packaging.

This additional 30-day policy does not reduce any rights you have under consumer law.

Unless the goods are faulty, damaged or incorrectly supplied, you are responsible for the cost of returning them.

Faulty, damaged or incorrectly supplied goods

If goods are faulty, not as described, not fit for purpose or otherwise fail to meet your statutory rights, please contact us as soon as possible.

Your rights are governed by the Consumer Rights Act 2015 and other applicable consumer legislation.

Depending on the circumstances and the time since purchase, you may be entitled to reject the goods for a refund or to require a repair or replacement.

Where we are responsible for supplying faulty or incorrect goods, we will also meet reasonable return costs where required.

Please contact us before returning a large item such as a bicycle so that we can arrange the most appropriate way of dealing with it.

Refunds

Once we have received and inspected returned goods, we will process any refund due to you.

Where you exercise a statutory cancellation right, refunds will be made within the timescales required by law. We may be entitled to wait until we receive the returned goods or evidence that they have been sent back before issuing the refund.

Refunds will normally be made using the original payment method.

Depending on your bank or payment provider, it may take additional time for the refunded amount to appear in your account after we have processed it.

Exchanges

Where stock permits, we are happy to arrange an exchange instead of a refund for eligible returned goods.

Please contact us if you would like to exchange an item.

Bikes and other large items

Please contact us before returning a bicycle or other large item.

Do not arrange an expensive courier return without first speaking to us where you believe an item is faulty or incorrectly supplied, as we may be able to arrange collection or another suitable solution.

Gift cards and vouchers

Gift cards and vouchers are not normally refundable for change of mind except where required by law.

Your statutory rights are unaffected.

Bike hire cancellations and refunds

Bike hire bookings are subject to our separate Bike Hire Terms & Conditions.

Our standard cancellation terms are:

  • where a booking is cancelled with more than 72 hours' notice, the 25% booking deposit is non-refundable but any balance paid will be refunded;
  • where cancellation is made with less than 72 hours' notice, or the customer does not attend for the hire, the full hire charge is non-refundable;
  • a booking may be transferred to another available date in the same calendar year without charge where at least 24 hours' notice is given; and
  • where Drover Cycles determines that weather or other conditions make it unsafe for the hire to proceed, a full refund will be offered.

Please see our Bike Hire Terms & Conditions for full details.

Workshop and other services

Where you ask us to carry out workshop or other services, your cancellation rights may depend upon whether work has begun and whether you expressly asked us to start work during any applicable cancellation period.

Once a service has been fully performed, there may no longer be a right to cancel simply because you have changed your mind.

This does not affect your statutory rights if a service has not been carried out with reasonable care and skill.

If you have a concern about work carried out by our workshop, please contact us so that we can investigate and, where appropriate, put the matter right.

How to request a return or refund

Please contact:

Drover Cycles (Hay on Wye) Ltd
Forest Road
Hay-on-Wye
Herefordshire
HR3 5DS

Telephone: 01497 822419
Email:
[email protected]

Please include your order or booking number where possible.

This Refund Policy forms part of our terms and should be read alongside the relevant Retail Terms & Conditions or Bike Hire Terms & Conditions.

2021 Transition Sentinel Carbon XT Full-Suspension Mountain Bike - Grey

Season:2021

Brand:Transition

Code:YRGiTTX.BRAC.TNES.12.BC.R

The Sentinel inspires confidence like you’re wearing full body armor

It’s forgiving do-it-all attitude truly blurs the lines between planted bottomless sender and playful poppy trail pony. Whether you’re chasing EWS dreams or just a weekend afternoon escape, it will bring out the best in you. So easy to get acquainted with you’ll find yourself sending lines, jumps and maneuvers you always felt were beyond your ability. Where before you went around, now you go over. Where you pushed up, now you pedal. Where you rolled, now you boost.

Lifetime Warranty

At Transition Bikes we take pride in the quality of our products and are stoked to offer a lifetime warranty for the original owner and our stellar crash replacement program. We got your back so you don't have to worry about your bike.

All Carbon Construction

Full carbon frame made form premium Japanese Toray fibre with a tailored blend of 24T and 30T materials to create the right balance of frame stiffness, strength and impact toughness. Out unique latex coated EPS molding process allows for sharper frame lines and tighter edge radius control with maximum strength to weight ratio and less wasted.

Pivot Technology

Collet main pivot technology improves rear end stiffness and keeps your pivot hardware tight. Additional bearing shields prevent amin pivot bearing contamination when washing your bike or riding in wet conditions.

Frame Protection

We keep your bike rides quiet and your frame safe from damage with fully integrated, flush-mounted rubber frame protection at all critical areas. In addition to downtube and seatstay protection, the ribbed chainstay protector features expanded coverage of the rear dropout pivot area.

Badass Bearings

We exclusively use EnduroMAX suspension pivot specific bearings in standard sizes that area readily available worldwide. Dual bearings are used at the dropout pivots for frame stiffness and additional c-clips lock the rocker bearings in place under torsional loads.

Gear Accessory Mount

out underside top-tube accessory mount allows you to carry a spare tube or other goodies safely on your frame in case you are looking to ditch the backpack.

Mega Seatpost Insertion

Dropper posts keep getting longer so we combine short seat tube lengths with mega seatpost insertion to help get your saddle completely out of the way.

Tyre Clearance

Ample clearance for mud and tyres up to 2.6" width.

User Friendly Cable Routing

To simplify maintenance and keep yur bike noise free, the rear derailleur cable is routed through guide tubes in the front triangle and chainstay.

Threaded BB

A standard 73mm threaded bottom bracket shell makes crankset maintenance hassle-free and prevents unwanted press-fit BB related moises.

Press-in Headset

Our ZS44/ZS56 press in headset gives you the freedom to use angle adjust headsets if you feel the need to make your bike a touch slacker or a touch steeper.

Angleset headset does not come with framesets or complete bikes.

Water Bottle Compatibility

We keep your water bottle clean inside the front triangle so you can keep hydrated without worrying about mud making it to your mouth.

Speed Balanced Geometry

SBG ensures the bike maintains low speed agility, front wheel traction, and proper rider weight balance while actually increasing confidence in steep terrain and at high speeds. With SBG, a slacker head tube angle is combined with a all new reduced offset fork standard, preventing the front wheel from being too far in front of the rider. This improves front to rear weight distribution on the bike, which is often out of balance on long and slack bikes. One of SBG's greatest benefits is that it creates a confident steering feel that adapts to wheel speed. More stability when going fast, more agility on technical slow speed maneuvering as well as improved traction, control and confidence for any skill level of rider.

Technical Information
  • Frame
    Sentinel Carbon 150mm
  • Rear Shock
    Fox Float X2 Performance 2 Position
  • Fork
    Fox Float 36 Grip Performance
    160mm Travel/44mm Offset
  • Headset
    FSA No.57E
  • Stem
    ANVL Swage (40mm)
  • Handlebar
    ANVL Mandrel Alloy 35
    SM/MD (800x20)
    LG/XL (800x30)
    XXL (800x 40)
  • Grips
    Sensus Lite
  • Saddle
    ANVL Forge Cromo
  • Seatpost
    OneUp Dropper Post
    SM (150mm)
    MD (180mm)
    LG/XL/XXL (210mm)
  • Brakes
    Shimano XT M8120
  • Rotors
    Shimano RT86 (203mm)
  • Shifter
    Shimano XT M8100
  • Derailleur
    Shimano XT M8100
  • Cassette
    Shimano SLX M7100 (10-51t)
  • Chain
    Shimano XT M8100
  • Crank
    Shimano XT M8100 (30t/170mm)
  • Rims
    Stans Flow S1
  • Spokes
    Sapim Race Double Butted
  • Hubs
    Stans Neo Durasync
  • Tire/Front
    Maxxis Assegai 3C EXO+ (29x2.5)
  • Tire/Rear
    Maxxis Minion DHRII 3C EXO+ (29x2.4)
  • Included
    Tubeless Valves & Stans Sealant (6oz)
  • Weight
    31.3 lbs / 14.21kg (Size MD)
Sizing Information

Sentinel Geometry

SMMDLGXLXXL
A. Reach420mm450mm476mm501mm521mm
B. Stack613mm622mm631mm640mm649mm
C. Effective Tt Length552mm585mm613mm641mm665mm
D. Seat Tube Length350mm390mm430mm460mm490mm
E. Effective St Angle78.2°77.5°76.9°76.4°76.0°
Saddle Height For Effective ST Angle600mm660mm720mm780mm820mm
Actual ST Angle70.8°70.8°70.8°70.8°70.8°
Seat Tube Offset AT BB87mm87mm87mm87mm87mm
F. Head Tube Length100mm110mm120mm130mm140mm
G. Head Tube Angle63.6°63.6°63.6°63.6°63.6°
H. Chainstay Length440mm440mm440mm440mm440mm
I. Wheelbase1199mm1233mm1263mm1292mm1316mm
J. Bottom Bracket Drop29mm29mm29mm29mm29mm
K. Estimated BB Height346mm346mm346mm347mm347mm
L. Stand Over Height671mm688mm700mm712mm722mm
M. Fork Offset43mm43mm43mm43mm43mm
Professional Opinion
Product Reviews
Write a review
0 As rated by 0 customers

Write a review for 2021 Transition Sentinel Carbon XT Full-Suspension Mountain Bike - Grey

Your name
Your email address
How would you rate it?
Would you recommend this product?
Let others know your opinion
Submit Review Close
Question(s) answered about 2021 Transition Sentinel Carbon XT Full-Suspension Mountain Bike - Grey
Ask a question
Question(s) asked regarding 2021 Transition Sentinel Carbon XT Full-Suspension Mountain Bike - Grey

Ask a question

Your name
Your email address
Your phone number
Your question
Submit Question  Close
Home Mountain Biking Bikes Transition Mountain Bikes