You already know the value of a name on your bike. But here’s something most riders have never considered: the same little sticker on your top tube or helmet can carry your blood type and an emergency phone number — turning a simple personalization into a genuine in-case-of-emergency ID.
It’s a small idea with a serious upside. And on a Pegatin sticker, you can do it today, because you decide exactly what goes on the two text fields.
Why riders put emergency info on their bike and helmet
Cycling is wonderful right up until it isn’t. A crash on a descent, a car that didn’t look, a solo ride far from home where something goes wrong — in those moments you may not be able to speak for yourself. That’s the gap an emergency ID fills.
If a first responder, a fellow rider, or a passer-by finds you, a few lines of clear information help them act fast:
- Who you are — your name.
- Who to call — an emergency contact number (this is the single most useful thing you can carry).
- What they need to know — allergies, a chronic condition, or a medication that matters in an emergency.
This is exactly why dedicated blood-type and ID stickers have become a quiet staple in adventure sports — you’ll find them on the helmets of mountain bikers, motorcyclists, skiers and trail runners. Cyclists are simply catching up.
What to actually put on it (and an honest word on blood type)
Let’s be straight about this, because it matters.
The information a first responder can act on immediately is your emergency contact number and any critical medical alert — a severe allergy, diabetes, epilepsy, or a blood thinner, for example. That’s the part that genuinely changes how you’re treated and who gets called.
Blood type is the detail most people ask for, and it’s reassuring to have on you — but be realistic about it. Hospitals will always re-test your blood before any transfusion; they won’t act on a sticker alone. So think of your blood type as useful context for responders and peace of mind for you, not a substitute for proper medical care or a certified medical bracelet if you have a serious condition.
The practical catch: you get 20 characters in total, split across two text fields however you like (the first prints in regular weight, the second in bold — and you can leave one empty). That’s not a lot of room — which is the point. It forces you to put down only what matters most. So you’ll choose between identity-first or medical-first, rather than cramming everything in.
If you want a deeper breakdown of what to write, we covered the full menu of options — name, flag, club, and ICE info — in our guide on what to put on your personalized bike sticker.
How to do it on a Pegatin sticker
Here’s the part nobody tells you: you don’t need a separate, single-purpose medical sticker. Your sticker has two text fields you can fill however you like — the first in regular weight, the second in bold for emphasis — sharing 20 characters in total (and you can leave one field empty if you want).
That gives you two clean ways to set it up:
Identity-first — keep your name and add your blood type:
- Regular field:
MARK ELLIS - Bold field:
O POSITIVE
Medical-first — lead with the critical info:
- Regular field:
O NEG - Bold field:
07700900123
Either way, the flag still gives you the clean pro look, and the bold field draws the eye to the detail that matters in an emergency. Twenty characters is tight, so keep it short: drop spaces and punctuation when you can — O+07700900123 says blood type and phone in just 13.
Want a specific color to match your kit or stand out more? Just email us at hello@pegatin.com and we’ll sort out a custom color for you.
Pick the right finish so it’s actually readable
An emergency line is only useful if it can be read at a glance — including on a dark helmet or a black frame.
For most riders we recommend the PRO option. It includes a white ink layer, which means your text stays bright and legible on any surface, dark ones included. On a glossy black helmet, black-only ink would more or less disappear; the white-backed print solves that. (If your gear is light-colored, you have more flexibility.)
Want a specific color to match your kit or stand out more? Just email us at hello@pegatin.com and we’ll sort out a custom color for you.
Place it somewhere a responder would naturally look — the side of the helmet and the top tube are both excellent — and apply it cleanly. Our guide on how to correctly apply and remove custom bike stickers walks through it step by step.
Frequently asked questions
Does a blood-type sticker replace a medical ID bracelet? No. If you have a serious medical condition, a certified medical ID is the right tool. A sticker is a helpful, visible extra — not a replacement.
Will it fit alongside my name and flag? You have 20 characters in total to split across two fields, plus your flag. That’s tight, so you’ll usually choose: keep your name short in one field and your blood type in the other, or go medical-first with your blood type and phone number. Your call on how to spend the 20.
Can I put it on my helmet as well as my bike? Absolutely — and we’d encourage both. A responder reaches the helmet first, and the bike stays with you if you’re separated from it.
Make your sticker work harder
Your name on the bike looks great and feels great. Adding a phone number and a blood type costs you nothing extra and could matter one day.
Create your sticker at Pegatin → — add your name, your flag, and, if you want, the few lines that turn it into an emergency ID.