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HUP Bike Size Guide

The best way to size your rider’s new bike is by Inside Leg measurement, as there is a large spread of leg lengths/heights for each age. This is easy and only takes a few seconds;

Stand your rider in socks against a wall
Put a small book between their legs (like a saddle, high as comfortable) and against the wall
Ask your rider to move away, measure from the top of the book to the floor, using cm or inches.

We list Minimum Inside Leg our kids race bikes (full Geo listed below for Adult bikes) on each product page. We measure from the floor up to the top-tube, in-front of the saddle, then minus 2-4cm for shoes, depending on age...

The chart below lists HUP bikes approx dimensions, when built to a standard spec 700c on 25c tyres. Using 650b (on a 700c frame) = 3cm lower standover. Flat bar builds (on a drop bar bike) = suitable for a 5cm shorter rider...

HUP evo:

700c Kids/Small Adult Sizes (all chainstays 430mm)* - CLICK HERE

Actual Standover (floor to top-tube, just in front of saddle nose): 37cm: 64cm | 44cm: 67cm | 48cm: 71cm

Size Guide (height/inside leg): 37cm: 125cm+ (60-69cm) | 44cm: 138cm+ (64-77cm) | 48cm: 145cm+ (68-78cm)

700c Adult Sizes (all chainstays 430mm and BB drop is 65mm) - CLICK HERE

Standover (floor to top-tube, in front of saddle): 50cm: 74cm | 52cm: 77cm | 54cm: 80cm | 56cm: 82cm | 58cm: 84cm

HUP evo SL:

700c Kids Sizes* - CLICK HERE

Actual Standover (floor to top-tube, just in front of saddle nose, on 700c x 25c tyres):

37cm: 65cm | 40cm: 66.5cm | 44cm: 68cm | 48cm: 72cm

Size Guide on small sizes (height/inside leg):

37cm: 130cm+ (64-73cm) | 40cm: 136cm+ (66-76cm) | 44cm: 144cm+ (68-77cm) | 48cm: 148cm+ (70-80cm)

Common for all frame sizes: Chainstay: 425mm | BB drop: 80mm

700c Adult Sizes - CLICK HERE

Standover (floor to top-tube, in front of saddle): 49cm: 74cm | 52cm: 77cm | 54cm: 80cm | 56cm: 82cm

HUP GCX:

Actual Standover (floor to top-tube, just in front of saddle nose, on 700c x 45c tyres):

46cm: 76cm | 49cm: TBAcm | 51cm: TBAcm | 53cm: TBAcm | 56cm: TBAcm

Size Guide on small size (height/inside leg): 46cm: 147cm+ (74cm+)

Common for all frame sizes: Chainstay: 430mm | BB drop: 69mm

HUP xc:

Actual Standover (floor to top-tube, in front of saddle):

13\" (27.5\"/100mm): 63cm | 15\" (29\"/120mm): 68cm | 17\"(29\"/120mm): 74cm | 19\"(29\"/120mm): 78cm

Tip: If you size with the saddle slammed, they've no room to move, so (unlike Road/CX) it's better to size down.

Size Guide (height/inside leg):

13\": 125cm+ (62cm+) | 15\": 145cm+ (66cm+) | 17\": 155cm+ (72cm+) | 19\": 165cm+ (76cm+)

Dropper Fitment: If you require a dropper post, the riders Inside leg needs to be at least equal to Seat Tube Length + Crank Length + Dropper Travel + 100mm to use the full dropper travel, otherwise only some travel will be useable.

* For small adults using the kids sizes, get in touch to confirm the best fit for you

HUP xc20/xc24:

Actual Standover (floor to top-tube, in front of saddle):

20\" wheels (80mm fork): 53cm | 24\" wheels\" (100mm fork): 63cm

Tip: If you size with the saddle slammed, they've no room to move, so (unlike Road/CX) it's better to size down.

Size Guide (height/inside leg):

20\" wheels: 105cm+ (49cm+) | 24\"wheels: 115cm+ (58cm+)

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SCX 2026-27 - Round 1, Muir of Ord, Inverness!