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What Frame Size Do You Need?

There are two basic steps to find out what Frame Size you need:

  1. Measure yourself accurately and carefully.
  2. Compare those measurements to the tables below and figure out which size of frame will fit you best.

Step 1 - Measure yourself accurately:

Our sizing guide considers your height and inside leg measurements to give you two points of reference in order to help you choose the right bike size.

All measurements are best taken in your bare feet and with the help of someone else.

First, measure your height:
To measure your height, stand upright against a wall with your legs together and shoulders back.

Place a pencil on the top of your head and mark the wall, measure from the floor to the mark (use centimetres if you are buying a Road, City or Mountain bike, or feet and inches if you are buying a BMX bike).

Next, measure your inside leg:
To measure your inside leg, stand barefoot and measure from the floor, up the inside of your leg.


Step 2 - Compare your measurements:

Now use the specific table below and find out which size you need according to your measurements.


Brand-X MTB Frames

HT-01 27.5" Small - 15" Medium - 17" Large - 19"
Frame Size 15" (38cm) 17" (43cm) 19" (48cm)
Rec. Rider Height (Imperial) 5' 3" - 5' 7" 5' 7" - 5' 11" 5' 11" - 6' 3"
Rec. Rider Height (Metric) 160 - 170cm 170 - 180cm 180 - 190cm
Rec. Inside Leg (Imperial) 28" - 30" 30" - 32" 32" - 34"
Rec. Inside Leg (Metric) 71 - 76cm 76 - 81cm 81 - 86cm
Seattube Length 380mm 432mm 483mm
(A) Effective Top Tube Length 570mm 595mm 620mm
(B) Headtube Angle 68° 68° 68°
(C) Seattube Angle 74° 74° 74°
(D) Chainstay Length 425mm 425mm 425mm
(E) Headtube Length 105mm 110mm 120mm
(F) Stack 605.83mm 610.47mm 619.74mm
(G) Reach 396.28mm 419.95mm 442.29mm
Bottom Bracket Drop 43mm 43mm 43mm
Wheelbase 1091.8mm 1117.3mm 1143.4mm
Max Tyre Size 27.5" x 2.3" 27.5" x 2.3" 27.5" x 2.3"
Seatpost Diameter 31.6mm 31.6mm 31.6mm
Bottom Bracket 73mm BSA 73mm BSA 73mm BSA
Headset� ZS44/28.6?� ZS56/40 ZS44/28.6?� ZS56/40 ZS44/28.6?� ZS56/40
Front Mech  34.9mm Band 34.9mm Band 34.9mm Band
Rear Axle 10mm x 135mm QR 10mm x 135mm QR 10mm x 135mm QR
Frame Material 6061-T6 Alloy 6061-T6 Alloy 6061-T6 Alloy
Based on Axle to Crown 519mm - 130mm travel 519mm - 130mm travel 519mm - 130mm travel