The two best-selling trail bikes in North America, both refreshed in the last two model years. The Trek Fuel EX is the modern reset of Trek's mid-travel trail platform - 140 mm rear, 150 mm front, in-frame storage, and slack-but-not-extreme geometry. The Specialized Stumpjumper is the bike that named the category, now 145/150 with the Genie shock and Rider-First sizing across six S-sized frames. Both can ride pretty much anything short of a dedicated enduro track. The choice is mostly geometry preference and which dealer you trust.
$3,500 - $11,000
Best for: Trail riders who want one bike for everything from XC laps to chunky descents
$3,000 - $10,500
Best for: Trail riders who want longer reach numbers and the Genie shock's progressive feel
| Aspect | Trek Fuel EX | Specialized Stumpjumper |
|---|---|---|
| Rear travel | 140 mm | 145 mm ✓ |
| Front travel | 150 mm | 150 mm |
| Reach (M / S3) | 460 mm | 465 mm |
| Stack (M / S3) | 618 mm | 620 mm |
| Head angle (low setting) | 65° | 64.5° ✓ |
| Internal storage | Yes | SWAT door |
| Size count | 5 | 6 ✓ |
| Entry price | $3,500 | $3,000 ✓ |
| Top trim price | $11,000 | $10,500 |
| Measurement | Trek Fuel EX | Specialized Stumpjumper | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | S | M | M/L | L | XL | S2 | S3 | S4 | S5 |
| Stack (mm) | 600 | 618 | 625 | 633 | 650 | 605 | 620 | 630 | 645 |
| Reach (mm) | 430 | 460 | 475 | 490 | 512 | 440 | 465 | 485 | 510 |
The two brands use different sizing systems but the bikes line up clearly. A Stumpjumper S3 (620/465) is closest to a Fuel EX Medium (618/460) on both stack and reach. An S4 (630/485) sits between Fuel EX M/L (625/475) and L (633/490). The Stumpjumper consistently runs slightly longer at the same nominal size, which suits modern long-low-slack preferences. Riders coming from Trek who want a similar fit should drop one S-size; riders coming from Specialized to Trek can size up.
Both bikes will pedal up any climb and descend anything short of a downhill course - the practical performance gap is small. The Stumpjumper has a slightly longer, slacker, more modern geometry profile and an extra 5 mm of rear travel that you can feel on bigger hits. The Fuel EX has Trek's dealer footprint and a slightly more conservative geometry that suits riders coming from older trail bikes. If you want the more progressive shock and the longer reach, the Stumpjumper edges it. If you want easier dealer access and a slightly more upright fit, the Fuel EX is the right call.
Specialized Stumpjumper - longer reach, slacker head angle, and the Genie shock's tuneable progression give it a small edge on rough descents
Specialized Stumpjumper - the 5 mm of extra rear travel and more progressive geometry are real advantages, though the Fuel EX is close enough that dealer access matters more for most buyers