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Trek Mountain frame

Trek Roscoe Size Chart

Roscoe runs S to XL in five sizes, with no XS. Trek publishes rider height and inseam for each size, and standover stays at 740 mm from ML up, so ML, L, and XL leave the same clearance.

Find my size See geometry by size

Frame sizes: S–XL · 5 sizes
Rider height: 5'1"–6'5"
Height (cm): 155–195 cm
Stack / reach · M: 644 / 440 mm

Roscoe 7 Gen 4 size finder

Which Roscoe 7 Gen 4 size covers your height?

Height gives you one size, or two when the published height ranges overlap. Stack, reach, and standover settle the overlap.

Measurement

Your height

Enter your height and the Roscoe 7 Gen 4 size that covers it is marked in the tables below.

How to measureHeight gives the starting size. Standover and reach confirm it.

Height ranges

Where each size starts and ends

S155–165 cm
M165–177 cm
ML173–180 cm
L177–188 cm
XL188–195 cm

151 cm175 cm199 cm

Size chart

Roscoe 7 Gen 4 size by height

Rider height and inseam are Trek's published Roscoe table. Trek builds no XS in this family, so the ladder starts at 155 cm.

Size

Height

Height cm

Inseam

Fit note

5'1"–5'5"

155–165 cm

–

Smallest Roscoe frame, with the lowest standover at 714 mm.

5'5"–5'10"

165–177 cm

–

Stack adds 40 mm over S, the largest stack step in the ladder. Stack and reach above are for this size.

5'8"–5'11"

173–180 cm

–

Stack adds 4 mm over M while reach adds 15 mm, so ML mostly makes the frame longer.

5'10"–6'2"

177–188 cm

–

Reach adds 15 mm over ML, and standover stays at 740 mm.

6'2"–6'5"

188–195 cm

–

Reach adds 30 mm over L, the largest reach step in the ladder. Standover stays at 740 mm.

5'1"–5'5"

155–165 cm

Smallest Roscoe frame, with the lowest standover at 714 mm.

5'5"–5'10"

165–177 cm

Stack adds 40 mm over S, the largest stack step in the ladder. Stack and reach above are for this size.

5'8"–5'11"

173–180 cm

Stack adds 4 mm over M while reach adds 15 mm, so ML mostly makes the frame longer.

5'10"–6'2"

177–188 cm

Reach adds 15 mm over ML, and standover stays at 740 mm.

6'2"–6'5"

188–195 cm

Reach adds 30 mm over L, the largest reach step in the ladder. Standover stays at 740 mm.

Start with height. If two sizes overlap, use cycling inseam to choose.How to measure

Geometry

Roscoe 7 Gen 4 geometry by size

Stack, reach, and standover for every Roscoe 7 Gen 4 size, read from Trek's published geometry table.

Size

Height

Stack

Reach

Standover

5'1"–5'5"

604 mm

415 mm

714 mm

5'5"–5'10"

644 mm

440 mm

735 mm

5'8"–5'11"

648 mm

455 mm

740 mm

5'10"–6'2"

662 mm

470 mm

740 mm

6'2"–6'5"

684 mm

500 mm

740 mm

5'1"–5'5"

Stack: 604 mm
Reach: 415 mm
Standover: 714 mm

5'5"–5'10"

Stack: 644 mm
Reach: 440 mm
Standover: 735 mm

5'8"–5'11"

Stack: 648 mm
Reach: 455 mm
Standover: 740 mm

5'10"–6'2"

Stack: 662 mm
Reach: 470 mm
Standover: 740 mm

6'2"–6'5"

Stack: 684 mm
Reach: 500 mm
Standover: 740 mm

Stack and reach by sizeStackReachBoth bars use a 0–700 mm scale

S5'1"–5'5"
Stack604 mm
Reach415 mm
M5'5"–5'10"
Stack644 mm
Reach440 mm
ML5'8"–5'11"
Stack648 mm
Reach455 mm
L5'10"–6'2"
Stack662 mm
Reach470 mm
XL6'2"–6'5"
Stack684 mm
Reach500 mm

How neighboring sizes compare

If two sizes both fit, compare reach and standover rather than assuming the larger size is more comfortable.

How to measure a bike frame

Size stepStackReachStandover
S → M+40 mm+25 mm+21 mm
M → ML+4 mm+15 mm+5 mm
ML → L+14 mm+15 mm0 mm
L → XL+22 mm+30 mm0 mm

Bike size calculator

Find your Trek Roscoe 7 Gen 4 size

Enter your height and inseam for a Trek mountain bike, then compare the result with this Roscoe 7 Gen 4 chart.

Find my size

Sizing notes

Why height alone is not enough

Riders with the same height can need different sizes because inseam, torso length, flexibility, and preferred handling differ.

3 checks

Stack climbs 80 mm from S to XL while reach grows 85 mm, so the frame gets longer and taller at about the same rate.
Standover climbs 26 mm across the ladder and stops moving at 740 mm from ML up.
Reach separates the top three sizes. L carries 470 mm and XL carries 500 mm, so a rider covered by both should choose on reach.

Sources

Confirm the exact bike after you have a starting size

Every number on this page comes from the sources below. Check the exact model year there before you buy.

Data reviewed: 2026-11-15

Trek Roscoe 7 Gen 4 sizing and geometry (official) →

Compare

Compare before buying

A size label does not mean the same thing across brands. Compare published geometry before you choose.

Trek bike size chart Trek Marlin size chart Compare Roscoe stack and reach with other bikes Interactive bike size comparisons

Related guides

More Trek and mountain sizing

Once you have a starting size, compare this frame against the Trek chart and the mountain guide.

Trek bike size chart

Compare Roscoe 7 Gen 4 against broader Trek size guidance.

Read

Mountain bike size chart

Check mountain sizing by height and inseam before choosing a frame.

Read

Questions

Roscoe 7 Gen 4 size chart FAQ

Short answers for Trek Roscoe 7 Gen 4 sizing.

What size Trek Roscoe should I ride?

Start with Trek's height range: S for 155–165 cm, M for 165–177 cm, ML for 173–180 cm, L for 177–188 cm, and XL for 188–195 cm. Then confirm standover for the size you land on.

Does the Trek Roscoe come in an XS?

No. Roscoe runs from S to XL, so S is the smallest frame and it takes riders from 155 cm. A shorter rider is outside the published range.

What size Roscoe fits a 175 cm rider?

175 cm sits inside Trek's M range of 165–177 cm. M carries 644 mm of stack and 440 mm of reach. ML starts at 173 cm, so 175 cm is also inside ML at 648 mm of stack and 455 mm of reach.

How tall is a Trek Roscoe L for?

Trek publishes Roscoe L for 177–188 cm, which is 5'10"–6'2". It carries 662 mm of stack, 470 mm of reach, and 740 mm of standover.

Is the Roscoe the same size as the Marlin?

The labels match but the frames do not. Roscoe starts at S while Marlin starts at XS, and the two publish different stack and reach, so check the numbers on the bike you are buying.