• Outside diameter: approximately 13"
• Inside diameter: Bored to 2.358" (see note below)

1) The inside diameter of the drive wheel must be individually machined for an exact fit to your rudder shaft. The specified inside diameter of the drive wheel to fit a Catalina 270, Catalina 28, or Catalina 30 rudder shaft is 2.358". If yours is greater than 0.003" difference, see our custom bore option #K2109 below.

2) This item does not conform to the shipping table in the Shopping Cart. Additional shipping must be calculated. When you place your order we always call with a shipping quote before billing your card. For a quote in advance, just call 800/959-7245.

3) The original hole for the through-bolt that secures the drive wheel to the rudder shaft was drilled with a hand drill from inside the boat after the boat was put together. Because of this, it is not possible for the manufacturer to drill the hole in both sides of the drive wheel and have any chance of it lining up with the original holes drilled in the rudder shaft. This means that you will have to drill the second hole yourself to match the original installation, using the original holes in the rudder shaft as a guide.

4) This cast aluminum part is in a corrosive environment. We highly recommend the use of MareLube TEF pictured below. The dissimilar metals (stainless steel fasteners into the aluminum wheel) are an ideal environment for galvanic corrosion to take place. MareLube TEF applied at the fasteners help isolate the stainless from the aluminum to prevent corrosion and make it easier to remove the fasteners in the future.

It is also important to flush the salt water residue out of this compartment periodically. Remove the inspection port and flush liberally with fresh water at least monthly. Remove the entire panel and clean thoroughly once a year.

5) Since radial drive wheels are installed in unseen spaces below deck they are not given the same level of fit and finish as above deck parts. The manufacture takes great pride in the parts they provide. Cosmetic imperfections are considered a tradeoff to provide the parts with the strength and durability required for years of service at a reasonable price. These replacement wheels are anodized after they were cast, but before they were machined to the specifications required for your boat model. After machining the radial drive wheels, the manufacture may use paint to cover some areas. This is not a defect, but a feature of the process to efficiently produce the radial drive wheels with the shortest lead time possible and get you back out sailing.

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