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Porkchop BMX

julio 26, 2026

6″ Grade 8 bolt with chromoly 3/8″ x 16T «stepped» bicycle stem wedge 21.1mm for

Bicycle stem bolt and wedge - for Tuf Neck and Pro Neck stems Bolt Material: Alloy Steel, Grade 8 Bolt length: 6" (some used 5 1/2" which we sell in another listing) Detailed measurements: Overall length 6 3/16", Shaft length 5 5/16", threaded portion 1 3/16" **THIS IS TOO LONG FOR THE REPLACEMENT QUILL WE SELL** Wedge Material: 4130 chromoly steel Finish: Black Oxide Fork steer tube inner diameter size: 21.1mm Threading: 3/8" x 16 threads per inch (this is coarse thread - some bolts Tuf Neck used were fine thread. This will only work with a SAE 3/8" coarse threaded bolt which is 16 threads per inch) NOTE: This is a stepped wedge. It will NOT fit a fully ramped quill.
julio 26, 2026

Suntour style old school 21.1mm quill BMX bicycle stem – SILVER

Old school style stem - chrome quill - silver aluminum alloy top and cap. No name brand. Pretty much a copy of the 1980's Suntour stem. Size: 21.1mm quill Brand new, never mounted. There are pock marks from the manufacturing process on the aluminum surfaces - this is normal for how this stem is made - it is not a defect.
julio 26, 2026

Stem stiffener for old school BMX 21.1mm quill bicycle stems – BLACK/SILVER

Old school BMX quill stem "stiffener" - known as a stem stiffener or flex fighter, this machined aluminum sleeve fits on your 21.1mm diameter BMX stem quill. Just tighten your stem wedge with this sandwiched tightly between your stem and headset locknut and you will minimize flex in your stem quill. Color: BLACK Material: Aluminum Height: 29.2mm (just shy of 1 3/16") Fits quill size: 21.1mm