I took off the rear cones and trumpets off my GT yesterday, and discovered a funny thing. I'm assuming one side was changed completely since the balljoint rubber is different on one side, as is the alloy trumpet (one of them has these 4 big ridges on the inside, the other has small ones).
The weirdest are the rubber cones though.
They are both the same height, yet one has a much larger metal part (4mm about). So when you stand them next to each other, the metal part is higher on one, but the rubber is slightly smaller so they end up with the same height...
Any ideas why this could be?
Cones different :\
Started by
Pavel
, Jul 29 2004 02:45 PM
3 replies to this topic
#1
Posted 29 July 2004 - 02:45 PM
#2
Posted 30 July 2004 - 08:07 AM
one of them is an improved model?
if there the same height though they will be ok for ride height but it would probably be best to try and get 2 the same, so your susspension will be even both sides
if there the same height though they will be ok for ride height but it would probably be best to try and get 2 the same, so your susspension will be even both sides
#3
Posted 01 August 2004 - 10:21 PM
There have been loads of different castings for the trumpets over the years but as long as they are the same length and weight (as they form part of the unsprung weight) and spring platform area they are fine.
The cones are a different story though. There have been quite a few different cones available at different times and in different territories. Problem is that although they are mostly the same size unloaded they are different compounds and different spring rates. The steel band affects the spring rate quite a lot by holding the rubber within it in shape. Also the age of the spring changes its rate.
It is always a good idea to change these springs in axle sets, so you might do well to replace them both with new or good used ones that you know to be the same type and age.
The cones are a different story though. There have been quite a few different cones available at different times and in different territories. Problem is that although they are mostly the same size unloaded they are different compounds and different spring rates. The steel band affects the spring rate quite a lot by holding the rubber within it in shape. Also the age of the spring changes its rate.
It is always a good idea to change these springs in axle sets, so you might do well to replace them both with new or good used ones that you know to be the same type and age.
#4
Posted 05 August 2004 - 08:45 PM
As Dan mentioned, you will probably find that the cone with the raised metal part has a different spring rate, would it by any chance be the fuel tank side?
Cheers
PS Assuming its the rear susp.
Cheers
PS Assuming its the rear susp.
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