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      06-30-2021, 10:37 AM   #1
FaRKle!
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Monoballs and Arms for Caster Adjustment

There are two main ways to adjust caster on modern BMWs, eccentric monoballs and adjustable tension strut arms. For eccentric monoballs SPL, KMAC, and Carbahn make them, but for tension strut arms I've only seen SPL. We'll take a look at the offerings from SPL and how they compare.


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Originally Posted by Index
0:00 Intro
0:34 SPL Tension Strut Arm Overview
5:09 SPL Caster Adjustable Monoball Overview
8:09 Instructions Comparison
9:59 Choosing One Over the Other
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      06-30-2021, 01:58 PM   #2
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Thanks for the review.

That is ridiculously thin wall aluminum tube! If that was my E90 I'd be lawyer shopping and I won't be buying their arms.
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      07-01-2021, 03:14 AM   #3
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Quote:
Originally Posted by RbBugBitMe View Post
That is ridiculously thin wall aluminum tube!
Agreed - I'd only ever install solid arms for suspension applications. Solid parts may deform if they are over-stressed, whereas a hollow component such as a tube can shear or suddenly fold if the load exceeds the design tolerance.
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      07-01-2021, 03:15 AM   #4
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Quote:
Originally Posted by FaRKle! View Post
There are two main ways to adjust caster on modern BMWs, eccentric monoballs and adjustable tension strut arms. For eccentric monoballs SPL, KMAC, and Carbahn make them, but for tension strut arms I've only seen SPL. We'll take a look at the offerings from SPL and how they compare.

Thanks for another clear and detailed review FaRKle!
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