Weber's rotisserie will not fit your 22.5 WSM.
To add a rotisserie to your WSM, you need t
he Cajun Bandit set-up.
The CB rotisserie will work on BOTH your 22.5 WSM
and your 22.5" Weber Kettle.
Rotisserie Ring (Weber Kettle / Weber Smokey Mtn) Price: $119.00
18 guage stainless steel rotisserie Ring Designed to fit both the 22 inch Weber Smokey Mountain and Weber Kettle. Design allows ring to be flipped over, so depending what product you are using a good tight fit is achieved. It also fits Ugly Drum Smokers. Due to variations by manufactures make sure the drum measures 22 9/16th across before you order. This is the most common size for 55 gallon drums. This product works with most rotisserie kits but is primarily designed for the one we offer on our site as well as the Rib-O-Lator.
you may question whether the CB rotisserie is worth the cost of it... in my opinion: Yes It Is.