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The Sentinel Carbon frameset is the perfect canvas to create to your ultimate custom build.
The Sentinel Carbon frameset is the perfect canvas to create to your ultimate custom build.
Transition

2020 Transition Sentinel Carbon FS Mountain Bike Frame in Red

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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
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Hassle free returns

At 99 Bikes our priority is to ensure that you are highly satisfied with your purchase. In the unlikely event that you aren't, we offer a 30 day online return policy* in which you can receive a full refund. Any item including bikes (with the exception of food) can be returned to us for any reason provided it is received by us in an unused and resalable condition in or with its original packaging which must be undamaged. In the event an item is returned to ourselves in an unsuitable condition, we may have to return the item or offer a partial refund. Unless the return is due to a faulty product or an incorrect delivery on our part you will have to cover the cost of the return. If you believe that we should be covering the cost of the return please contact us in advance to discuss the available options.

In line with the customer rights act 2015 if you receive an item that is faulty, of un-satisfactory quality, unusable or that differs from how the product is described you are entitled to return the item for a full refund within 30 days of purchase.

Small Items - Parts & Accessories

Include the returns form and send it to us with the delivery company of your choosing - easy peasy!

Larger Items - Bikes / Bulky Items

If you wish to return bikes or bulky items such as forks or turbo trainers please contact our Returns Department to arrange a special courier collection. Contact us on our email address websales@99bikes.co.uk We can arrange collection for you from your home or work address, using our couriers ( You may be required to cover postages costs )

* Bulky Items Include - Bikes - Wheels/wheelsets - Turbo Trainers - Framesets - Forks - Groupsets - Car racks - Child Seats

Warranty Claims

Please contact us prior to returning so we can ensure the fastest suitable resolution for you: websales@99bikes.co.uk. We also ask that you contact us before having a 3rd party undertake work on an item purchased from 99 Bikess. Any work carried out without 99 Bikes consent will not be eligible for reimbursement and may void future warranty claims for that item.

2020 Transition Sentinel Carbon FS Mountain Bike Frame in Red

Season:2020

Brand:Transition

Code:DERrioNtoniPDER.BRAC.TNES

Transition Sentinel Carbon Frame  

The Sentinel Carbon frameset is the perfect canvas to create to your ultimate custom build. The all carbon construction including carbon rocker arm makes this bike very lightweight, durable and stiff in all the right places. For rear suspension, we worked tirelessly with Fox to create the perfect tune with the extremely impressive DPX2 rear shock. Amazing small bump sensitivity like a coil shock and excellent mid-stroke support and bottom out control. The Sentinel Carbon Frameset features a threaded BB, external rear brake routing for easy brake maintenance, full water bottle storage inside the main triangle, boost rear end and rubber molded frame protection.
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.
Giddyup 2.0HH Suspension
Take their successful GiddyUp suspension system, add one part increased pedaling efficiency, two parts wider sag range, and three parts increased small bump sensitivity, and you get GiddyUp 2.0HH. Incredible pedaling performance balanced with a superb neutral, comfortable and fun feel that they're known for.
 
They specifically tuned the suspension with a moderate amount of chain growth which is highest at the sag point and decreasing deeper into the travel. Because of this finely tuned wheel path, there is a notable increase in traction when climbing, without the rider noticing the chain growth fighting the suspension movement.
 
GiddyUp 2.0HH is extremely easy to setup and it provides excellent support throughout the entire stroke of the shock so you can use all your travel without worrying about bottom out. Designed to be active while climbing, rear shock climbing platforms are not necessary. The suspension remains free to smooth out the trail, improve traction and control without sacrificing efficiency. With GiddyUp 2.0HH you can focus on the trail, no remotes, levers or knobs. Just grab your bike and GiddyUp.
 

 

All UK Mainland Bike Deliveries Over £499 - Free

Bike orders are sent via TNT/FedEx with estimated delivery within 1 working day after quoted dispatch time (For Scottish Highlands, Northern Ireland, Isle of Man and the Channel Islands deliveries please allow an additional 1-4 working days).
Bike orders under £499 will incur a £20 delivery fee

Free Delivery On Orders Over £50.00

When you spend more than £50.00 at 99 Bikes deliveries to a UK mainland address will be free (excludes bikes & large items).

Certain regions and territories of the UK will incur additional charges, details of which can be found on our delivery page.

Click & Collect Orders

Please be aware Click & Collect orders may take some time to fulfil. We advise not to travel to your chosen store until you have been notified that your order is ready for collection.

Spread the cost of your new bike, helmet, safety equipment and accessories paying via instalments being taken directly from your wage. The payments for the Cycle To Work scheme are taken out of your gross wage and your Tax & NI contributions are then worked out based on your new lower gross wage which is how you save money on your new bike and equipment.

At the end of the time period specified with your Cycle To Work scheme you then have the option of buying your bike or to continuing to use it while you work for the company. If you decide to purchase the bike, the balance you owe will be based on a percentage of how much the bike was worth at the time you took out the Cycle To Work scheme.

We know how eager you'll be to jump on your new bike and hit the dirt or tarmac, so we give you everything you need to get you set up quickly. For full instructions on how you're bike will arrive and what you'll need to do, visit our How Our Bikes Are Built page

Easy Set-Up Instructions

Have your brand spanking new bike ready to ride in less than 15 minutes with our easy to follow guide.

Free Multi-Tool

9 in 1 multi-tool to help you set up and maintain your bike.

Free Pedal Spanner

Attach your pedals with ease using our free tool. Please note pedals are not included with all bikes so please check the specification. You can shop our awesome range of pedals HERE

Special Offer

30% Off Selected Pedals & Helmets With All Bikes

Get 30% off a select range of pedals & helmets when you purchase a bike from 99 Bikes. Once you add the bike to cart you will be taken the pedal selection page to add your half-price pedals, discount will be applied at the checkout.

Technical Information

Frame Features

Fork Axle to crown: 562mm

Fork Offset: 37mm

Rear Shock Size: 205mm x 65mm

Rear Shock Hardware: Trunion mount top / 25mm x 8mm bottom

Headset: 44mm zero stack (top) / 56mm zero stack (bottom)

Bottom Bracket: 73mm bsa threaded

Rear Brake: 180mm post mount

Rear Axle: Syntace x12 148

Front Derailleur: No support

ISCG Tabs: iscg05

Seatpost Diameter: 31.6mm

Max Seatpost Insertion Alloy: XS 140mm, Small 140mm, Medium 185mm, Large 225mm, XL 270mm

Max Seatpost Insertion Carbon: Small 190mm, Medium 225mm, Large 245mm, XL 245mm

Seat Clamp: Alloy 34.9mm/Carbon 37mm

Maximum Chainring: 34t

Maximum tyre: 27.5 x 2.8

Sag setup: 20-23mm (32-35%)

Frame Weight: Carbon 7.47 lbs. - 3.39 kg/ Alloy 9.48 lbs. - 4.3 kg

Warranty: 3 year we got your back warranty

Sizing Information

 

SIZE SM MD LG XL
REACH 425 450 475 500
STACK 596 605 614 623
EFFECTIVE TT LENGTH 555 583 611 640
SEAT TUBE LENGTH 360 400 440 490
EFFECTIVE ST ANGLE 77.8 77.1 76.6 76.1
HEAD TUBE LENGTH 100 110 120 130
HEAD TUBE ANGLE 64 64 64 64
CHAINSTAY LENGTH 430 430 430 430
WHEELBASE 1179 1209 1238 1268
BOTTOM BRACKET DROP 15 15 15 15
ESTIMATED BB HEIGHT 340 340 340 340
STAND OVER HEIGHT 680 685 695 710
FORK OFFSET 37 37 37 37
INEFFECTIVE TOPTUBE* 1.442 1.604 1.685
DOWNTUBE ANGLE 60 60 60 60

 

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