To find the right tyres for your car using your registration number, you can use any of the following online tools:

1. Kwik Fits Tyre Size by Registration Plate tool
2. F1 Autocentres Tyre Size by Registration tool
3. HiQ Tyres & Autocares Search by Reg tool
4. Bridgestones Search by registration tool
5. ATS Euromasters vehicle registration lookup tool
6. Protyres Find your tyres by car registration number tool

These tools will provide you with the most likely fitment for your car based on your registration number. However, it is important to check the size of the tyre you want to replace before ordering, as tyre sizes can vary even on similar vehicles. You can find the correct tyre size for your car by looking at the sticker thats usually found on the inside of the driver side door jamb, which lists the size and specification of your tyre. Once you know the correct tyre size, you can decide on what kind of tyre is best for your purposes, such as winter tyres, all season tyres, or specific 4x4 tyres.