Part number

Quick Learner from Riverside nj

Jun 28, 2020 1:39 pm

1/2 x 21 balancer with2010 marked on it. The S351 or S390 look like they match. Can you tell me which one I must order. Thank you

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4 Replies

Casey from SWISCO

Jul 1, 2020 11:53 am

I agree. To choose between the two balances, take a look at the diagram below and measure to determine if you have a 1" or 1-1/8" deep bottom attachment. Thank you!

Comparison of the S351 and S390 balance shoes.

Quick Learner from Riverside nj

Jul 1, 2020 12:22 pm

It looks like I have an inch and 3/16 So I assume I use an S390. Thank you

1 user uploaded image

Casey from SWISCO

Jul 1, 2020 2:15 pm

The shoe can wear down a bit over time but if it measures over 1", I would agree that the s390 would be the way to go.