Steel Frame Mountain Bikes

Steel Frame Mountain Bikes

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Rockrider ST500 Mountain Bike 24 Rockrider ST500 Mountain Bike 24 Rockrider ST500 Mountain Bike 24
Rockrider ST500 Mountain Bike 24
Decathlon Btwin

Rockrider ST500 Mountain Bike 24" Kids 4'5" to 4'11"

(Average rating: 4.5 out of 5 stars, 5472 Reviews)

Sale price, $149.00 Regular price, $349.00

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Btwin ST120 Kids' Mountain Bike 20 Btwin ST120 Kids' Mountain Bike 20 Btwin ST120 Kids' Mountain Bike 20
Btwin ST120 Kids' Mountain Bike 20
Decathlon Btwin

Btwin ST120 Kids' Mountain Bike 20" Kids 3'11" to 4'5"

(Average rating: 4.59 out of 5 stars, 17 Reviews)

Sale price, $119.00 Regular price, $199.00

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Free shipping over $49

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Btwin Rockrider ST100 Mountain Bike 20 Btwin Rockrider ST100 Mountain Bike 20 Btwin Rockrider ST100 Mountain Bike 20
Btwin Rockrider ST100 Mountain Bike 20
Decathlon Btwin

Btwin Rockrider ST100 Mountain Bike 20" Kids 3'11" to 4'5"

(Average rating: 4.59 out of 5 stars, 630 Reviews)

Sale price, $99.00 Regular price, $279.00

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Btwin Rockrider ST500 Mountain Bike 20 Btwin Rockrider ST500 Mountain Bike 20 Btwin Rockrider ST500 Mountain Bike 20
Btwin Rockrider ST500 Mountain Bike 20
Decathlon Btwin

Btwin Rockrider ST500 Mountain Bike 20" Kids 3'11" to 4'5"

(Average rating: 4.59 out of 5 stars, 3447 Reviews)

Sale price, $129.00 Regular price, $299.00

Limited Sizes

Free shipping over $49

See shipping rate at checkout

About Our Steel Frame Mountain Bikes Collection

Looking to get into mountain biking? Our steel frame mountain bikes are perfect for your excursion. Efficient, comfortable, and safe, these bikes are built to handle rough terrain and tough trails. They’re lightweight so you can fly down the trail and strong so you can brave even the steepest of slopes.

Mountain Bike Accessories

Artengo, our in-house cycling brand, designs and develops bikes and accessories to make your ride safe and fun, whether you're going out on a leisurely ride or gunning down a steep trail. 

Socks and Shoes

If you’re looking to get started in cycling, you’re going to need the right gear to make your experience safe, comfortable, and fun. Decathlon’s Artengo cycling brand designs toe socks to keep your feet dry and comfortable on the road, trails, and the highest peaks. We also have shoes and socks to keep you going on the road, in the trails, and on the highest peaks.