April 24, 20179 yr Hi there, I am looking to replace my Chain and sprockets on my 2015 4rt thinking to get Haas rear sprocket in a 41T equivenant and a 10T front as I believe that is standard gearing. Renthal R1 chain. Can anyone advise me as to the length of chain to buy. cheeres in advance
April 25, 20179 yr You don't really get the choice. What we might call trials chain comes packaged in a standard length which is longer than needed for most bikes. It is then shortened to suit. Off the top of my head I can't say what the 4RT length is but you can work it out from what was on it by counting the teeth and adding or subtracting as necessary based on the length of the old chain (I'm assuming non standard gearing from your question). As you don't have a local trials dealer up there you will likely be going mail order - a good dealer will chop the length for you but far better to get a chain tool as well and do it yourself to suit the bike. There is good scope for chain adjustment on the 4RT due to the two threaded holes for the stops. I run mine on the one that keeps the wheelbase as short as possible, which may differ from as they come.
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