Toying with idea of replacing fork on a '71 Super Sport and 27" fork, 7 1/2 (190mm) steer tube lenght and about 50mm of rake. Fork is OK, just thinking ahead and the replacements have a 22.2mm ID for a better stem selection.

I noticed Niagra Cycle Works carries Dimension (Hi Ten) and Sunlite (Black) and Sunlite (chrome). Chrome is cheaper for some reason. Any real differences between them?


Tom

That is lot of rake offset. What is the head tube angle? What steer tube diameter fits the headset?

This fork fits. 1" steer tube. Bike is a standard Schwinn Super Sport from the 70's. Are you sure you are not confusing degrees vs mm of rake? Heck, I have an old Pegasus fork with 70mm of rake which would be great for going in a straight line, but turning, not so much.

https://www.niagaracycle.com/product_...ucts_id=415875 and says 50mm of rake.


Just wanted to know if there was any real difference in quality between the Hi -Ten Dimension and the Sunlite forks.

Tom

High tensile 1010 steel has a lower yield strength than a 4130 Chromium molybdenum alloy steel.
but the tendency is to bring up the wall thickness of the tubes used to make it equal,
but it will be a bit heavier as a result.
they re both coming from Asia just thru different Importers QBP vs J&B, I think..

Actually you've got that concept backwards. Increasing rake offset will reduce steering trail and reduce stability. Reducing rake offset increases stability and the tendency for a bike to travel in a straight line. https://yojimg.net/bike/web_tools/trailcalc.php https://www.phred.org/~josh/bike/trail.html https://www.phys.lsu.edu/faculty/gonz...9no9p51_56.pdf.
Modern popular road bikes commonly have relatively steep head tube angles, 72 to 74 degrees and rake offsets in the 40 to 45 mm range. Of course there are exceptions.
The fork in question and found at the linked site is probably suitable for an older frame or a touring bike built with a more relaxed head tube angle and 27 inch wheels. It may be perfect for your bike, I let my curiosity get to me.