Checkpoint ALR 3 Gen 3 - Sizing

How tall are you?

To measure your height, stand straight up, barefoot, with your back, heels, shoulders and head all touching a wall. While looking straight ahead, place a book or straight edge on your head and slowly push it against the wall. Your straight edge should be parallel with the floor. Mark the spot where the bottom of the book is touching the wall. The distance from the marked spot to the floor is your height.

What is your inseam?

How to measure: Stand barefoot with your back straight and against a wall. Tuck a ruler or something that extends to the floor between your legs. Using both hands, and keeping it level, pull the ruler up into your crotch as if you were sitting on the saddle. Measure the distance from the top edge of the ruler to the ground to find your inseam measurement. Your inseam is very important to your final bike size so please measure carefully.

Sizing

size-table
Size Rider Height Inseam
XS

143 - 158 cm

4'8" - 5'2"

67 - 74 cm

26" - 29"

S (49cm)

158 - 164 cm

5'2" - 5'5"

74 - 77 cm

29" - 30"

M (52-54cm)

164 - 177 cm

5'5" - 5'10"

77 - 83 cm

30" - 33"

ML (56cm)

177 - 188 cm

5'10" - 6'2"

83 - 88 cm

33" - 35"

L (58cm)

188 - 194 cm

6'2" - 6'4"

88 - 91 cm

35" - 36"

XL (61cm)

194 - 203 cm

6'4" - 6'8"

91 - 95 cm

36" - 37"


Geometry

Labeled bike diagram showing geometry points A to N.
Geometry diagram labeling frame measurements A through N. Each label corresponds to a row in the geometry table below.

All measurements provided in cm unless otherwise stated.

Sizing table
Frame size letter Wheel size A — Seat tube B — Seat tube angle C — Head tube length D — Head angle E — Effective top tube G — Bottom bracket drop H — Chainstay length I — Offset J — Trail K — Wheelbase L — Standover M — Frame reach N — Frame stack
XS 700c 44.5 74.1° 9.6 71.2° 53.6 7.8 43.5 4.9 7.4 102.5 73.5 38.0 54.5
S 700c 48.0 73.7° 11.7 71.6° 54.8 7.8 43.5 4.9 7.1 103.3 76.5 38.5 56.6
M 700c 50.5 73.2° 14.0 71.8° 56.8 7.6 43.5 4.9 7.0 104.1 78.9 39.1 58.9
ML 700c 53.0 72.8° 16.2 72.2° 58.0 7.6 43.5 4.9 6.7 104.8 80.9 39.7 61.1
L 700c 55.0 72.5° 18.1 72.3° 59.2 7.4 43.5 4.9 6.6 105.8 82.9 40.2 63.0
XL 700c 57.5 72.1° 20.1 72.6° 60.4 7.4 43.5 4.9 6.5 107.0 85.9 40.8 65.0