mudplug wrote:
Looking at changing my rear tyre for an FIM/ACU approved and looking at Mich comp 3's..my current tyre size is 100/100x18 but comp 3's don't appear in this size what size can I use//Thanks.
If you want a FIM approved enduro tyre, go for a 120/90-18. Maxxis do a FIM enduro in this size as do most manufacturers (Michelin/Metzeler etc).
On a CRF 230 a 120 FIM will be plenty big enough. They normally come in 120 or 140 widths - I'd whack a 140 on anything bigger than a 250cc bike, but for 125cc to 250cc, the 120 is grip a plenty! There is a 130 width on the market - the Yamaha WR250 come with these as stock now.
The Maxxis IT pro's (as recommended) are NOT FIM approved - they (like AC10's) are road legal motocross tyres (knobs are greater than 13mm depth). If you do want road legal Motocross tyres, the maxxxis IT pro are really good - but remember they are sized differently to FIM tyres....... basically 120 FIM = 110 IT Pro and a 140 FIM = 120 IT pro.
Hope this helps!