Your bike ships fast for a $94.99 flat rate.






Giant ATX Mountain Bike - 2021, Small
Item #BMT23875
Recommended Rider Height: 5'2" - 5'5" Sizing Guide
Condition: NEW
Shipping
Quick Assembly
- Bikes arrive tuned and mostly pre-assembled
- Torque tool & video guide included
- Get riding in 15 minutes
Guaranteed Buyback
We'll happily purchase this bike back from you when you're ready for your next upgrade. A TPC buyback offer is guaranteed for 18 month on all qualifying bikes.
30-Day Returns
If this bike isn't perfect for you, our Ride Guides will help you find the right one.
Why We Love It
Details
Year | 2021 |
Brand | Giant |
Model | ATX |
Size | Small |
Frame Material | Aluminum |
Drivetrain | Microshift, 3x7 spd |
Weight | 29 lbs 12 oz |
Build
Fork | SR Suntour |
Fork Travel | 75mm |
Rear Shock Travel | N/A |
Brakes | Alloy, Direct/Linear Pull (V-Brakes) |
Shifters | Shimano EF41, Mechanical |
Front Derailleur | microSHIFT |
Rear Derailleur | microSHIFT 26C |
Bottom Bracket Shell | Press fit |
Crankset | ProWheel Alloy, 42/34/24t, 170mm |
Cassette | SunRun, 14-28t |
Chain | KMC |
Handlebar | Giant Sport Alloy, 640mm |
Headset | Integrated |
Stem | Giant Sport Alloy, 25.4mm x 60mm, 6° |
Seatpost | Unbranded Alloy, 30.9mm |
Saddle | Giant Sport |
Front Axle Spacing | 9x100mm (Quick Release) |
Rear Axle Spacing | 10x130mm |
Wheelset | Giant Aluminum, Alloy |
Front Tire | Kenda, 27.5" x 2.1" |
Rear Tire | Kenda, 27.5" x 2.1" |
Tire Type | Clincher |
Tubeless Compatibility | Wheels are not tubeless compatible |
Pedals | Sold separately |

Recommended Rider Height |
5'2" - 5'5"
|
a. Effective Top Tube | 575 mm |
b. Seat Tube | 420 mm |
c. Seat Tube Angle | 73.5° |
d. Head Tube Angle | 68° |
e. Head Tube | 95 mm |
f. Stack | 581 mm |
g. Reach | 403 mm |
h. Standover Height | 721 mm |
i. Saddle Height Range | N/A |
Giant ATX Mountain Bike - 2021, Small
Item #BMT23875
Recommended Rider Height: 5'2" - 5'5" Sizing Guide
Condition: NEW
Shipping
Your bike ships fast for a $94.99 flat rate.
Quick Assembly
- Bikes arrive tuned and mostly pre-assembled
- Torque tool & video guide included
- Get riding in 15 minutes
Guaranteed Buyback
We'll happily purchase this bike back from you when you're ready for your next upgrade. A TPC buyback offer is guaranteed for 18 month on all qualifying bikes.
30-Day Returns
If this bike isn't perfect for you, our Ride Guides will help you find the right one.
Need Advice? Ask a Ride Guide
Our Ride Guide team is based in the U.S. and staffed with former bike mechanics, bike shop managers, and other certified bike nerds. Get expert advice on calibrating fit, deciding between models, or chat through any other questions.
Curated for you
-
Lezyne RAP II 18 Multi Tool Black
$24.99
-
MSW Jetstream Adjustable CO2 Inflation Head
$19.99
-
Wolf Tooth WT-1 Chain Lube for All Conditions
$6.95
-
Planet Bike 12g CO2 Non-Threaded Cartridges - 3 Pack
$3.99
$9.00 -
Radavist Silver Stallion Water Bottles (Pair)
$25.00
-
Cygolite Zot 450 and Hotshot Micro 30 Light Set
$43.99
$67.95 -
Race Face Chester Pedal Platform Black
$54.99
$59.99 -
Mavic XA Belt Hip Pack Black
$20.99
$44.00 -
Skratch Labs Sport Hydration Drink Mix Fruit Punch 20-Serving Bag
$19.95
-
Skratch Labs Energy Bar Sport Fuel Raspberries & Lemons 12-Pack
$29.50
$31.80 -
Garmin Edge 130 Plus GPS Cycling Computer
$199.99
More Mountain Bikes
-
CERTIFIED PRE-OWNED
Trek Remedy Mountain Bike - 2018, 15.5"
$2,749.99
-
CERTIFIED PRE-OWNED
Specialized Stumpjumper EVO Comp Alloy Mountain Bike - 2023, S2
$3,499.99
-
CERTIFIED PRE-OWNED
Pivot Mach 4 SL Mountain Bike - 2020, Small
$6,499.99
-
CERTIFIED PRE-OWNED
Cannondale Habit 4 Mountain Bike - 2022, Small
$2,499.99
-
CERTIFIED PRE-OWNED
BMC Twostroke 01 FOUR Mountain Bike - 2022, Small
$3,899.99
-
CERTIFIED PRE-OWNED
Devinci Spartan Carbon GX LTD Mountain Bike - 2020, Small
$3,999.99
-
CERTIFIED PRE-OWNED
Yeti ARC TURQ Mountain Bike - 2021, Small
$7,499.99
-
CERTIFIED PRE-OWNED
Cannondale F-Si Carbon Women's Mountain Bike - 2016, Small
$2,299.99
-
CERTIFIED PRE-OWNED
Cannondale Scalpel-Si Carbon 2 Mountain Bike - 2020, Small
$3,999.99
-
CERTIFIED PRE-OWNED
Ridley Ignite SLX Rigid Mountain Bike - 2021, Small
$2,199.99
-
CERTIFIED PRE-OWNED
Whyte S-150 S Mountain Bike - 2019, Small
$2,499.99
-
CERTIFIED PRE-OWNED
Specialized S-Works Enduro Mountain Bike - 2021, S2
$7,999.99