Kels Posted June 17 Report Share Posted June 17 Hello So my 37 Biz coupe has split bore sizes on both the front and rear wheel cylinders. The rear has 1 1/8" and 1 1/4" with the mount bolts at 1 3/4" C-C spacing. Part number stamped in them-->22113 The front has 1 1/4" and 1 3/8" with the mount bolts at 1 15/16" C-C spacing. This is correct in my Service manual. BUT.. when I search for new rear wheel cylinders ( I need them) I get conflicting, but mostly, the 1 1/4" and 1 3/8" for bore diameters.. they show the different mounting spacing but the bore diameters are not the same as mine. here is the EBAY link that shows the wheel cylinder kits and specs--> https://www.ebay.com/itm/173593577530?epid=13024885152&itmmeta=01J0J3EB9N1EZ49K0FSFFENZJ9&hash=item286afbc83a:g:9gsAAOSw9sBdE7Fv&itmprp=enc%3AAQAJAAAA8CH%2FU6lK8hMnLwq6D7DP4yVZXMIXJI7x8G8v4YXgVphFtUakLaSVW5BYMIjcJw1PBY24YtzJgk748yNdaimmVXKNr7ED8MKHl%2BeFmufNJOAcxJf2uoYkkwSRfR1FB%2Fx8BWtjtlRxlfodeisqn0fAZkRMOX%2F4R%2FsWdalc2mzCIbtJlATH4lgaxclSvXjHJftr8UAyO7DTeQRFMkCXJltESW%2BWDZnNy7%2BkeBGxhnHCQfkLSyvXnMaIC%2FxgbWAZPxuFMdHYztK5SICNGPc30Gyb5wJlOWUThEVysHV2Hv%2BOwolymf2TtlnYnrmc7TuBAFEiCw%3D%3D|tkp%3ABFBM9rS5w4Rk Questions: 1) What is the aftermarket part number for the rears with the bore diameters I have? 2) Can I install the larger Bore Diameters in my rear without issues since the mounting C-C is correct, or are they too big to install? Thanks in advance! Quote Link to comment Share on other sites More sharing options...
sidevalvepete Posted June 17 Report Share Posted June 17 (edited) I found this in my '38. I did check that they were original, or same as original in Workshop Manual and Parts Manual. Then I had them all reconditioned and stainless sleeves installed. They work great and I don't have some possibly inferior, modern aftermarket replacements. May be an option for you... Edited June 17 by sidevalvepete Quote Link to comment Share on other sites More sharing options...
SteveR Posted June 17 Report Share Posted June 17 I had to hon out my front wheel cylinders and replace new seals. They were not pitted so all worked out fine. Can you hon out your existing wheel cylinders? Quote Link to comment Share on other sites More sharing options...
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