24 Inch Tyres
At AW you can find 24" mountain bike clincher tyres to be used with a separate inner tube for all types of riding.
24" for trials, dirtjumpers and kids bikes
24 inch wheels can be found on kids bikes for 8 to 11 year olds, but are also the common choice for a lot of dirt jump and trials specific bikes as they comply with smaller frame sizes which gives greater control and flexibilty when throwing the bike around the jumps and tricks. This means that the tyres need to perform as well as, or better than, 26" "full-sized" tyres, so no comprimise should be acceptable.