Size Guide

Frame Sizing Guide — Bamboo Bicycle Club
Find Your Perfect Fit

Frame Sizing Guide

Built to your body. Designed for adventure. Get the perfect bamboo frame size in 3 minutes.

Why Getting the Right Size Matters

An ill-fitting frame isn't just uncomfortable — it's a distraction. Too large, and you'll be stretched out fighting gravity on climbs. Too small, and you're cramped, your knees banging your elbows with every pedal stroke.

The right size frame does something special: it disappears. You stop thinking about the bike and start thinking about the road, the trail, or your destination.

Here's what the right size gives you:
  • Efficiency — optimal leverage, power transfer, and speed
  • Comfort — reduced strain on joints and muscles
  • Control — confidence and responsiveness
  • Longevity — injury prevention through alignment

Two Measurements. That's It.

Just two numbers determine your ideal frame size. Spend 3 minutes measuring now, save months of discomfort later.

1. Your Height (Standing Measurement)

  1. Stand barefoot with your back flat against a wall
  2. Have a friend mark the very top of your head
  3. Measure from floor to mark in centimetres

2. Your Inner Leg Length (Inseam) — The Critical One

This is the primary determinant of your frame size.

  1. Remove shoes, socks, tight pants recommended
  2. Stand with back against wall, feet shoulder-width apart
  3. Place spirit level between legs (as if sitting on a seat)
  4. Measure from floor to top of level in centimetres

💡 Pro tip: Have a friend help. A 1cm error = a completely different frame size.

BBC Frame Size Chart

Find your size by matching your inseam. If between sizes, use height as secondary reference.

Size Height Inseam Seat Tube Top Tube
XS 148–163 68–74 40 48
S 160–173 74–80 46 51
M 170–183 78–86 52 54
L 180–193 84–92 56 57
XL 190–203 90–100 60 60
2XL 200+ 98+ 64 63

Understanding Stack & Reach

Not all frames are equal. Two same-size bikes can feel completely different.

Stack

Vertical distance from bottom bracket to head tube

  • Higher stack = upright, comfortable
  • Lower stack = aggressive, fast

Reach

Horizontal distance from bracket to head tube

  • Longer reach = stretched, aerodynamic
  • Shorter reach = upright, control

Our Frame Types

Each BBC geometry is tuned for a specific purpose:

Road & Race

  • Lower stack, longer reach
  • Aggressive position
  • Speed & efficiency
  • Choose if: Racing or speed-focused

Gravel & All-Road

  • Medium stack & reach
  • Balanced fast + comfort
  • Mixed terrain
  • Choose if: Speed AND comfort matter

City & Commute

  • Higher stack, shorter reach
  • Upright position
  • Visibility & control
  • Choose if: Comfort is priority

Between Two Sizes?

Use your inseam. It's the primary factor.

Want More Comfort?

Choose the larger frame. More upright position, easier climbing.

Want More Speed?

Choose the smaller frame. More aggressive, better aerodynamics.

Still Unsure?

Email us with your measurements. We'll recommend based on your style.

Frequently Asked Questions

I'm between two sizes. Which one?

Answer: Use your inseam. If exactly between, consider your riding style: want comfort? Larger. Want speed? Smaller. Unsure? Email us with measurements.

What if I have long arms/short legs?

Answer: This is why we offer six sizes. Email us with height, inseam, and arm span. We'll recommend the best size and any adjustments (stem, bars).

Can I size up or down for my riding type?

Answer: Yes, carefully. Size up for touring (comfort), down for racing (control). Start with your inseam size, then adjust with stem/bar changes if needed.

I've never built a bike. Does sizing still matter?

Answer: Absolutely. Poor sizing = discomfort AND injury risk. Spend 3 minutes measuring. Save months of problems.

What if my size isn't in stock?

Answer: We can custom-build to unusual sizes. Contact us for timeline and options.

Pre-Order Checklist

  • Height measured — barefoot, wall, cm
  • Inseam measured — with level, cm
  • Size selected — chart checked
  • Frame type chosen — road, gravel, city
  • Unsure? — Email before ordering

Still Have Questions?

No measurement is too unusual. No question too small. We want you to get the right size.

Email Us Contact Form

Ready to Build Your Frame?

Now that you know your size, let's build something extraordinary.

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Last updated: March 2026. Always measure yourself before ordering. Questions? We're here to help.