Trek Slash geometryMTB · 2024 · 5 sizes, from S to XL

The Trek Slash is a mtb bike available in 5 sizes, from S to XL. Stack ranges from 588 to 659 mm and reach from 430 to 513 mm. Its position sits between racing and endurance.

Stack588–659mm

Reach430–513mm

Head angle63.3–63.5°

Chainstay length429–439mm

Calm steeringPlantedSteep seat angleHigh BB

What size Slash do I need?

Enter the stack and reach of a bike that fits you well and we will tell you which size is closest and how to set it up.

Stack in mm Reach in mm Compare on Fitbikefy →

SS 588 · R 430

MS 623 · R 448

MLS 632 · R 468

LS 641 · R 488

XLS 659 · R 513

Enter your stack and reach to see which size fits you best.

Geometry chart by size

Measurements in mm and degrees, as published by Trek. The ones that matter most for choosing a size are in bold.

Size	S	M	ML	L	XL
Stack	588	623	632	641	659
Reach	430	448	468	488	513
Effective top tube	548	578	605	628	658
Head tube length	100	100	110	120	140
Head angle	63.5°	63.3°	63.3°	63.3°	63.3°
Effective seat angle	78.1°	77.8°	77.3°	77.1°	76.7°
Actual seat angle	74.0°	73.8°	73.8°	73.8°	73.8°
Chainstay length	429	429	434	434	439
Wheelbase	1,195	1,224	1,253	1,278	1,312
BB drop	10	27	27	27	27
BB height	352	351	351	351	351
Fork offset	43	43	43	43	43
Trail	132	143	143	143	143
Standover	727	766	766	767	768
Seat tube (method not stated)	390	400	420	435	470

Source: Trek official website · data from 11 Nov 2026.

Stack and reach of every size

Higher means a taller front end; further right means a longer reach. The blue dot is your search.

Character of each size

Compared with other mtb bikes. Further right means more of that quality.

Positionracing → relaxed

Steeringcalm → quick

Pedallingrearward → forward

Bottom brackethigh → low

Wheelbaselively → planted

Rear endstable → agile

Bikes with similar geometry (size ML)

The closest size of other mtb models, by stack and reach.

ModelΔ stackΔ reach

Canyon Sender · M2027−2 mm±0 mmCompare →

Specialized Demo Race · S42026±0 mm−2 mmCompare →

Specialized STATUS · S32026+2 mm+2 mmCompare →

Canyon Exceed CF · L2027±0 mm−3 mmCompare →

Trek Session · R22022+2 mm+4 mmCompare →

Cube FRITZZ C:62 Super · L2026−1 mm+5 mmCompare →

Frequently asked questions

What size Slash do I need?

It depends on your position, not just your height. The most reliable way is to compare the stack and reach of a bike that fits you with those of each size (from 588/430 mm in size S to 659/513 mm in size XL). The size finder on this page shows the closest size and the stem and spacers you would need.

What are the stack and reach of the Slash in size ML?

Stack of 632 mm and reach of 468 mm, with an effective top tube of 605 mm and a head angle of 63.3°.

Is the Slash a racing or an endurance bike?

In between. In size ML its stack-to-reach ratio is at percentile 37 of mtb bikes: neither very low nor very tall.