REP Fitness AB-5200 Weight Bench

Back Pad - Wobble Fix

5/1/2021

The Incorrect Bolt Suggested by some Online DIYers is:

M12-1.75 x 150 Hex Cap Bolt Class 8.8 Zinc

The new metric Bolt diameter is correct for the metric Bushings inside the weight bench - BUT, the Bolt suggested is TOO SHORT and so therefore the threads on the Bolt barely thread onto the lock-nut and doesn't even come into contact with the blue plastic inside the lock-nut.

It's a great "attempt" to tell everyone that owns a REP Fitness AB-5200 weight bench on how to fix the back pad wobble, but in a week the nut is just going to fall off.

>> ANSWER: Just get the next available longer size bolt:

M12-1.75 x 160 Hex Cap Bolt Class 8.8 Zinc Coarse Partial Threads ZINC CLEAR Item # 137037

The only place I could find it is here: Bolts and Nuts.com

$4.38 + ($7.00 shipping) = $11.38

Important Note: You can use the original lock-nut, you don't have to buy another one. This is quite strange because the New Bolt is Larger in diameter, than the original.

Question: What is REP Fitness is doing WRONG (with this Adjustable Weight Bench) ?

Answer: They are MIXING Metric Bushing hardware sizes with an American Measurement system Bolt size!