Threaded to ahead adapter 1 1/8″

Clean way to convert your threaded 1 1/8 fork / headset to ahead to use clamp style stems.
You can measure which size you need by measuring the width of stem part that goes into your frame / headset, this is either 25.4 mm (1″) or this size, 28.6 mm (1 1/8)

— for the best result use a the BMX stem with a 15 mm spacer
— converts / extends the inside of your fork / headset (25.4 mm) to the modern 1 1/8 clamp size (28.6 mm)
— clean looking top cap solution that fits nicely on the top of your stem