Sunday Park Ranger BMX Frame 20.5 Inch
- Size: 20.5 inches
- Suspension Type: Front, Rear
- Is Assembly Required: Yes
- Model Year: 2023
Last refreshed Jun 21, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A chromoly frame built around quick, technical park and street geometry, well suited to riders assembling their own custom build rather than buying a complete bike.
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ASIN: B0CJ5CR8CXCategory: BMX Bike Frames
Overview
The Sunday Park Ranger is a bare BMX frame, not a complete bike, built from 4130 chromoly steel with a 20.5 inch top tube for park, transition and street riding. It ships in the Toothpaste green colorway with round Nightshift-style tubes.
This is a frame only purchase, so a fork, wheels, drivetrain and cockpit all have to be sourced separately to build a complete bike. Sunday pairs a steep head tube angle with short chain stays for sharp, quick turning, and combines that with a tall bottom bracket and low standover height for pedal clearance through tricks. Hollow 8mm dropouts with internal chain tensioners and removable brake mounts keep chain tension and brake setup simple to adjust.
- 4130 chromoly steel frame, 20.5 inch top tube
- Steep head tube angle with short chain stays
- Hollow 8mm dropouts with internal chain tensioners
- Toothpaste green finish with round top and down tubes
Who it's for
Riders who already run their own build kit and want to swap in a lighter, more aggressive chromoly frame for park or street riding. Not for anyone who wants a ready to ride bike straight out of the box.
Pros and cons
- 4130 chromoly steel for durability
- Removable brake mounts simplify setup changes
- Internal chain tensioners keep dropouts clean
- Frame only, no fork or components included
- No rating or review data available yet
Performance notes
The steep head tube angle and short chain stays quicken the steering and make tight, technical turns easier to hold. A tall bottom bracket combined with a low standover height gives extra pedal clearance during tricks without changing the seated riding position much. The hollow 8mm dropouts with internal chain tensioners let riders dial in chain tension without external tensioner hardware.
Specifications
| Brand | Sunday |
|---|---|
| Dimensions & fit | |
| Size | 20.5 inches |
| Capacity & performance | |
| Bicycle Drivetrain Type | chain drive |
| Age Range Description | Youth, Adult |
| Power & efficiency | |
| Power Source | Pedal |
| Construction & materials | |
| Color | Toothpaste |
| Frame Material Type | Chromoly Steel |
| Wheel Material | Alloy Steel |
| Included components | |
| Included Components | Pump |
| Other details | |
| Suspension Type | Front, Rear |
| Is Assembly Required | Yes |
| Model Year | 2023 |
| Bike Type | BMX Bike |
| Number Of Handles | 2 |
| Is Autographed | No |
| Additional Features | Lightweight, Unique Design Elements |
| Specific Uses For Product | Trail |
| Brake Style | Rim Brake |
| Skill Level | All |
| Style Name | Bmx |
| Theme | Bicycle |
Closest rivals on specs
Syndyt 185 Junior BMX Racing Frame 18.5 Inch- Size 20.5 vs 18.5 inches (+11%)
Frequently asked questions
Does the Sunday Park Ranger frame come with a fork or wheels?
No, this listing is the frame only.
What wheel size does this frame take?
It's built for 20 inch wheels, standard BMX sizing.
Can rim brakes be run on this frame?
Yes, it has removable brake mounts, so you can run rim brakes or leave them off for a brakeless setup.