Most 1” forks are threaded and most 1 1/8” are threadless but there was an overlap period when some manufacturers produced 1” threadless and 1 1/8” threaded.
@yoav started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported exclusively by donations. Consider donating a small amount regularly.
Most 1” forks are threaded and most 1 1/8” are threadless but there was an overlap period when some manufacturers produced 1” threadless and 1 1/8” threaded.