When you're building a kids' specialty BMX bike with an old-school look, a common tug-of-war is wheels versus brakes. Two parts in this range pull in different directions: a Cheng Shin knobby tire/tube pair and an ENIX complete brake set. The tire pair is listed at USD 34.99 and includes two tires plus two tubes. The brake set is listed at USD 33.99 and includes calipers, cables, and a lever. They're almost the same price, but each one answers a different question.
Quick verdict
If you need the stopping side of the build handled in one purchase, the ENIX brake set is the more complete solution. If the braking side is already sorted and you want to change the wheel look first, the Cheng Shin tire pair is the more visual route. The one-dollar gap between them is small enough to let the missing part decide.
Head-to-head at a glance
| Aspect | Knobby BMX Tires + Tubes | ENIX Complete Brake Set |
| Listed price | USD 34.99 | USD 33.99 |
| What you get | Two knobby 20x2.125 tires + two tubes | Front & rear side-pull calipers, cables, and lever |
| Finish / material | Black rubber | White aluminum |
| Old-school fit | Named for old school SE GT DG Torker GJS | Named for BMX and BMX - Old School |
Where each product wins
Pick the tire/tube pair when the project is about rolling stock. The Cheng Shin model is called DAY 1 BMX TIRE, and the tread is the classic COMP2-style knobby pattern. The pair comes as a matched set, so it's a direct wheel refresh for an old-school build.
Pick the complete brake set when the bike needs a stop package. The ENIX part is a full brake set rather than a single caliper: side-pull calipers, a cable, and a lever in white aluminum. It suits a build where the cockpit needs an old-school-looking stop lever and caliper to match.
Cheng Shin Knobby BMX Tires + Tubes
This is the rolling-stock choice. It's a new pair of Cheng Shin black rubber tires, and the set also includes two Fit Bike Co tubes, so you're getting a matched set for the wheels. The DAY 1 BMX TIRE model name leans into the retro theme, and the knobby tread follows the classic COMP2-style pattern. Its trade-off is that this is a tire-and-tube purchase, not a brake purchase; if the bike still needs a stopping system, that part is a separate step. For a build where the old-school look starts at the wheels, this pair gives you both tires and tubes in one buy at its listed price.
ENIX White Old-School BMX Complete Brake Set
This is the stopping-system choice. The ENIX set is new and all-aluminum, and it includes front and rear side-pull calipers plus the cable and lever, so the title's 'complete' is backed by what's inside. The 88mm max caliper width and 67-85mm lever dimension give useful geometry for an old-school cockpit, and the lever clamp is sized for 22.2-23.8mm bars. The trade-off: this is a brake package, not a rolling-stock package; you'd still need wheels and tires to turn it into a rideable bike. If the brake hardware is the missing piece, this is the more complete starting point.
Final choice by use case
- For a build that already stops and needs a wheel upgrade, the Cheng Shin knobby tire + tube pair is the pick.
- For a build missing its brake hardware, the ENIX complete brake set covers calipers, cable, and lever in one go.
- On a kids' specialty BMX bike, both parts keep the old-school theme going; the brake set is the functional gap-filler, while the tire pair is the high-impact rolling upgrade.
