Depends how much you want to spend. The Hobbywing (HW) v3.1 1S is a high-end speedo that is bullet proof for GT12. The previous version (HW 120A v2.1 1S) is still around the used forums for about £60 for a good one.
If you want the security of a new one and a warranty then the new GForce 1s 120amp is a new one with HW guts and a different case. It's big advantage for GT12 is that the switch and capacitors are built in (like the HW V3.1) so the only space you need in the car is the footprint of the speedo.
Contact Zen for delivery (
www.zen-racing.co.uk) as they show out of stock at the moment. I think this is going to be a very popular speedo as it is the guts of one of the best on the market at a price that really suits the GT12 and 12th classes. HTH
