Well here’s something I didn’t think about until today. On some Borrani aluminium motorcycle rims, there is a number (other than the usual WM and wheel diameter). It may look like this “RM-01-4701” or “RM-01-4777”.
It turns out that the Borrani aluminium motorcycle rims that have a number like this, are supplied by Borrani direct to a motorcycle manufacturer and were for specific model(s).
Borrani rims that don’t have this number, are ones supplied by Borrani un-drilled, so they can be drilled at the correct angle / offset for whatever bike you want to mount it to.
Decoding the text stamped by Borrani on their Record rims.
Here’s an example: WM3 – 18 40 RM-01-4701
WM3 = 2.15″width of rim
18 = 18″ rim
40 = number of spokes
RM-01 = Not sure but an educated guess suggests that it’s the Italian acronym for Record Model which is the model design of the rim. Or, it might mean “Record Motorcycle” as “RW” seems to mean Record Wire (for cars).
4701 = The number that relates to the specific model / manufacturer that the rim is for. Borrani supplied (and still supply) many manufacturers.
They used codes like 4450, 4403, 4607, 4777, 4446, 4845, 4544…
Here’s what I have managed to gather so far:
- 4544 = Moto Guzzi Le Mans S3 Rear
- 4845 = Moto Guzzi Le Mans S3 Front
- 4777 = Ducati 750/900 Super Sport
- 4701 = Don’t know. But I have one.
- 4761 = Laverda 3C Front
- 4613 = Laverda 3C Rear
- 4446 – Front Laverda or Grimeca drum
- 4445 – Rear 200 Grimeca drum
- 4743 – Rear spoke/disk SFC, very rare
- 4321/1 – 1970’s Honda CB750
I believe BSA and Triumph also used Borrani’s when the equivalent Dunlop flanged rims were unavailable. However, that might be complete rubbish. I was just told that.
Further help needed to identify Borrani aluminium motorcycle rims
If you can help to build the picture of the Record rim numbers, I will make a page in the “Technical” section of the site so that everyone has access.
View other wheels and rims for sale
I have a few rims. I generally don’t have any Borrani rims available, but it’s worth a look.
Sometimes, I put a notice up on TheTimingChest Facebook page letting everyone know that something interesting is about to become available. It may be worth following the page.
