There is nothing that ruins a ride faster than a bike that doesn't fit. If it's too big, you’re overreaching and killing your lower back; too small, and you’ll feel cramped and twitchy on the corners.
At Papanui Cycles, we use a standard XXS to XXL grading. While every brand has its own geometry, this guide is the best "rule of thumb" for getting it right the first time.
Quick Reference Size Chart
Best for Road, Hybrid, and Commuter bikes.
| Size | Rider Height (cm) | The "Vibe" |
| XXS | 135 – 148 | Great for kids moving up or petite adults. |
| XS | 148 – 158 | Easy to handle, compact frame. |
| S | 158 – 168 | Small, nimble, and easy to hop on/off. |
| M | 168 – 178 | The "average" fit for most Cantabrians. |
| L | 178 – 185 | Stable and comfortable for taller riders. |
| XL | 185 – 193 | Plenty of reach for long arms. |
| XXL | 193 – 203+ | For the giants among us. |
The "Between Sizes" Dilemma
If you measure yourself and find you’re exactly between two sizes (e.g., right on the line of M and L), don't stress. It’s actually a good problem to have.
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Go Smaller (M): If you want the bike to feel "whippy." Smaller frames are easier to manhandle on tight mountain bike trails or in heavy CBD traffic.
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Go Larger (L): If you want stability. A longer wheelbase feels "planted" and is much more comfortable for long-distance cruising or bike-packing.
Two Things a Chart Won’t Tell You
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The Standover: You need a bit of daylight between you and the top tube when you’re standing over the bike with flat feet. If you’re hitting the frame, it’s too big.
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The Reach: If you feel like you’re doing a plank just to reach the handlebars, the frame is too long. Your elbows should always have a slight, relaxed bend.
Come See Us in Papanui
Look, charts are 90% accurate, but the last 10% comes down to how you feel on the saddle.
If you're in Christchurch, come visit the shop. We’ll get you on a few different frames, adjust the seat height, and make sure you’re rolling out of here on a bike that actually fits your body and your riding style.
Still unsure? Give the team a call or send us a message. We’d rather spend 10 minutes talking you through it now than have you dealing with a bike that’s a literal pain in the neck later.