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37 Posts
Discussion Starter #1
it's time to change the sprockets on the st and am thinking about switching the rear to aluminum.

i guess my question is, is there any real drawbacks to this? all my other bikes have alum. rear sprockets on them with no problems, but i also don't put the miles on them like i do with the st.
 

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Life is too short to worry !
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2,650 Posts
I learnt my lesson on this one.
I went for a Renthal rear a couple of years back and there was no doubting the weight saving but the question is longevity.
It ran for quite a long time but once the Hard Anodising wore through , it fell apart , and as we are talkng about a bike with touring intentions within its remit this is not good.
The main problem stems from the speed of failure , so long as the hardened surface is there averything is fine but once it goes it wears extremelly fast.
e.g. I left on a 4 day trip to Ireland , usual pre-trip chceks done , chain/sprockets checked and adjusted , scotoiler filled etc. All went well for the first two days and then on the thrid I noticed the bike becoming ever increasingly lumpy (my wife even noticed)
At the end of the day , upon returning to the hotel , I gave the bike a look over to discover the 3 teeth on the sprocket had sheared and the chain was now knackered and sagging sadly on the sprockets. I had not taken the spindle nut socklet with me so had to limp the 400 miles home with the worry of a broken chain etc on my mind.
The Renthal had managed approx 7000 Mls compared to the previous steel at 22,000 Mls
I now use a Stealth which is Aluminium with a steel outer toothed ring and hope to get the good wear alongwith lower weight and a nice look.
 

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I think you will find on this board that most will tell you to go with steel.

Our bikes are high torque, tour-capable machines. I ask myself this question with everything I do to the ST:

Will this mod cause me MORE or LESS concern when away from home?

In putting on 100% alum sprockets, my answer would be MORE concern so I wouldn't do it.

I think this way when messing too much with with gadgetry/electronics, and other items as well but that is just me. Not that I don't have mods, quite the contrary, but it is the mentality.

Nothing is bulletproof, but if you don't go with high quality/durability and try to achieve that standard with everything you do with the ST you will pay the price.

Guido built it for mileage so maintain it for mileage.

Cheers
 

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Still needs a life.
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12,619 Posts
I think 104 is long for 15/41. I'm running 15/42 with 102 links, which should be as from the factory. 104 is needed if moving up to 15/43.
Bill W.
I always ran two extra links when using a 42T rear sprocket.
 
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