Originally Posted by
FBinNY
It's almost 100% certain that you measured the stem which was 7/8" OD. It fits a fork with the same ID, and therefore it's 99.99% certain the steerer is 1" OD, and since it's not from Italy, we can be equally sureit's a 1"x24tpi threaded steerer.
An Italian steerer will still be 1" x 24tpi, just with Whitworth thread form instead of BSC.
Then again it's a Raleigh. How great would it be if it were a 1" x 26tpi?