Rock Shox Revelation Fork Question

flying_fish

I am building a On-one 456 at the minute and have been looking for a fork. There are some good deals on merlin and CRC for Rock Shox Revelations but I am confused with the differences between them.

I have looked on the Rock Shox website but its not very clear what the differences are (or I dont know enough about forks to understand what the different technologies actually mean!). Can anyone explain what the difference is between each of the three forks (RLT, RCT3 and XX)

Thanks for your help

RLT
http://www.merlincycles.co.uk/Bike+Shop/Frame++Forks/Forks++Shocks/Rockshox+Suspension+Forks/2012+Rockshox+Revelation+RLT+15mm+Axle_RS-REVELATION-RLT-15.htm

RCT3
http://www.merlincycles.co.uk/Bike+Shop/Frame++Forks/Forks++Shocks/Rockshox+Suspension+Forks/2012+Revelation+RCT3+-+Dual+Air+-+150mm+-+15mm+Maxle+-+White_RS605002.htm

XX Dual Air
http://www.chainreactioncycles.com/Mode ... elID=67905

nicklouse

All on their webby

http://www.sram.com/rockshox/category/107