Giant Fathom 1 27.5" Mountain Bike 2023 - Hardtail MTB
Get your daily dose of singletrack with the Giant Fathom 1 27.5” MTB. With a lightweight frame, 130mm suspension fork and 27.5 wheels with high-volume tyres, this hardtail mountain bike offers loads of traction, speed and fun on the trail.
Key Features:
- ALUXX SL-Grade Aluminum frame
- Giant Crest 34 gives 130mm of travel to keep you in control
- Sram gears give you smooth and precise shifting every time
- Shimano brakes give you the stopping power you need in all weathers
- Maxxis Ardent Race tyres give you the confidence to take every corner at speed
- Sizes: S, M, L, XL
- Colours: Knight Shield
- The Giant Fathom 1 27.5” is available with 0% APR Finance
Trail tuned design
Balanced geometry with a 75-degree seat tube angle puts the rider in a powerful pedalling position on climbs, while a slacker 66-degree head angle boosts confidence and control on technical descents.
Responsive handling
Lightweight ALUXX SL aluminium hardtail frame offers agile acceleration and manoeuvrability to help riders climb, corner and hammer the flats with efficiency and speed.
Smooth control
Giant Crest 34 suspension fork with 130mm of travel absorbs roots, rocks and ruts. Grippy, high-volume tires boost traction on rugged terrain. And a dropper seatpost with handlebar remote lets you adjust saddle height on the fly for confident positioning on changing terrain.
All Tredz bikes are:
- Fully built & ready to ride
- Fully checked & tested by Cytech qualified mechanics
- Available with 0% APR finance on any basket over £99
- UK price match promise
- 365 day no hassle returns
- Free delivery in the UK Mainland on a date that suits you
In the box with every Tredz bike is:
- Free Tredz 9 key trail tool
- Free Tredz pedal spanner
- Free basic pedals
- Tredz drawstring kit bag
- 16 point quality control check sheet
- Basic bike setup instructions
- Free Cycle Plan insurance voucher (8 weeks)
Occasionally, without notice, manufacturers change product design and/or specifications.
| Frame | ALUXX SL-Grade Aluminum |
| Fork | Giant Crest 34 SL RCL, 130mm, 44mm offset, Boost 15x110 |
| Stem | Giant Contact SL 35 S:40mm, M:40mm, L:50mm, XL:50mm |
| Bars | Giant Contact TR35, 780x35mm |
| Front Brake | Shimano BR-MT420/410, hydraulic, Shimano RT-26 rotors [F]180mm, [R]180mm |
| Rear Brake | Shimano BR-MT420/410, hydraulic, Shimano RT-26 rotors [F]180mm, [R]180mm |
| Brake Lever | Shimano BR-MT401 |
| Front Mech | N/A |
| Rear Mech | SRAM NX Eagle |
| Shifters | SRAM SX Eagle, 1x12 |
| Speed | 12 |
| Rims | Giant AM 27.5, tubeless ready sleeve-joint rim, 30mm inner width |
| Front Hub | alloy, sealed bearing |
| Rear Hub | alloy, sealed bearing |
| Spokes | Stainless steel |
| Front Tyre | Maxxis Ardent Race 27.5x2.6, folding, TR |
| Rear Tyre | Maxxis Ardent Race 27.5x2.6, folding, TR |
| Seat Post | Giant Contact Switch dropper, remote S: 125mm travel / 30.9 x 395mm M: 125mm travel / 30.9 x 395mm L: 150mm travel / 30.9 x 440mm XL: 170mm travel / 30.9 x 450mm |
| Saddle | Giant Romero |
| Chainset | SRAM SX Eagle, 30t S:165mm, M:170mm, L:170mm, XL:170mm |
| Bottom Bracket | SRAM DUB, press fit |
| Chain | SRAM SX Eagle |
| Cassette | SRAM SX Eagle, 11x50 |
| Pedals | N/A |
Mountain Bike Size Chart
|
Height
|
Bike Size
|
Mountain Bike Size
|
|
4’8” – 5’1”
143 – 155 cm
|
XXS
|
13” (33 cm)
|
|
5’1” – 5’4”
155 – 163 cm
|
XS
|
15” (38 cm)
|
|
5’4” – 5’7”
163 – 170 cm
|
S
|
16” (41 cm)
|
|
5’7” – 5’10”
170 – 178 cm
|
M
|
18” (46cm)
|
|
5’10” – 6’0”
178 – 183 cm
|
L
|
19” (48cm)
|
|
6’0” – 6’3”
183 – 191 cm
|
XL
|
20” (51 cm)
|
|
6’3” – 6’5”
191 – 196 cm
|
XXL
|
21” (53 cm)
|
|
6’5” – 6’9”
196 – 205 cm
|
XXXL
|
22” (56 cm)
|
* Mountain bikes are sized differently to road bikes. Typically, they are sized in inches as the first MTBs were produced in the USA. European brands like Lapierre and Haibike like to use centimetres for all their bikes. The measurements of their mountain bikes doesn’t match their road bikes but are like a simple conversion from the inches measurement. This is why we have included cm measurements in brackets for the Mountain bike column.
Read our bike size guide for more information on sizing.
Customer reviews and Q&A's are disabled because you declined functional cookies.
To enable reviews and Q&A's click the 'Cookie Settings' button below and enable functional cookies.
Giant Fathom 1 27.5" Mountain Bike 2023 - Hardtail MTB
I received my bike and noticed a day later I had a issue with the paint on the frame, the service was excellent, replacement bike sent out which is perfect thank you!
Cycle to Work is a salary sacrifice scheme, where you can save up to 42% off a new Bike and Safety equipment. This means the cost is deducted from your salary as a non-cash benefit, so you save on tax and national insurance.
Here at Tredz, we accept Cycle to Work vouchers from all national schemes. For more information click here.
At Tredz, we’re committed to bringing you the best products at the best prices. If you find a product cheaper elsewhere, simply contact us for an immediate response using our live chat service. Click here to discuss your price match with an agent now for help.
Subject to Terms and Conditions
At Tredz, we offer a fast high quality service, with a range of options from free delivery on orders over £20, next day and convenient click & collect from one of our stores. Simply select within the checkout.
*Courier deliveries to Northern Ireland, Isle of Man, Isle of Wight, Channel Islands and the Scottish Highlands/Islands will incur a charge.When you receive your bike, all you'll need to do is unpack it, attach the pedals, turn the handlebars and ride.
To help you get started we have put together a handy Bike Building Guide, click here.
At Tredz, if you are not 100% happy with your order, then you can use our simple hassle free returns service. Simply return the item new and unused in the manufacturers original packaging within 365 days of purchase. Bikes and larger items are collected by courier.