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Best 20 x 2.125 Bicycle Tires for Tricycles
Two 57-406 folding tires for wide-cushion 20 inch trike wheels, with an off-road tread option and a colorful pair.
Updated · 2 min read · 2 products evaluated
A 20 x 2.125 tire is a wide, soft profile coded 57-406, which means 57 millimeters of casing on a 406 millimeter bead seat. On a trike it gives cushion over cracked pavement and light gravel, and a larger contact patch under each wheel's constant load.
Only two products here are true 20 x 2.125 tires, and both are folding-bead designs. One is a single mountain tire with a protective layer under the tread, and the other is a pair with a stated pressure window. Which suits you depends on the surface you ride.
Short answer
The Hycline folding tire is the better pick for mixed surfaces thanks to its open knobbed tread, a protective layer the maker says adds 30 percent more puncture resistance, and 30 TPI casing. The WEEROCK pair suits riders who want two matching tires and a stated 40 to 50 PSI window for paved and light-path use.
Quick Picks
Our 2 recommendations at a glance. Tap a pick for the full verdict.
Best for Mixed Surfaces
Hycline 20 x 2.125 (57-406) Folding Mountain Bike Tire
Trikes on dirt, gravel and pavement
Best Matching Pair
WEEROCK Colorful 20 x 2.125 (57-406) Folding Bike Tires, 2 Pack
Matching two wheels on a paved-path trike
Our Picks
Best for Mixed Surfaces1 of 2
Hycline 20 x 2.125 (57-406) Folding Mountain Bike Tire
An open knobbed tread, 30 TPI casing and a protective layer for puncture resistance on mixed paths.
Best for
Trikes on dirt, gravel and pavement
Why we like it
The Hycline tire is 20 x 2.125 (57-406), fits tire widths from 1.95 to 2.125 and uses a 30 TPI casing. The tread has open, aggressive knobs for soil penetration and mud clearing, with tight convex knobs that the maker says give grip on hard roads.
A protective layer under the tread is stated to add 30 percent more strength and puncture resistance, and a carbon steel bead lets it fold for storage. Compared with the WEEROCK pair it grips loose ground better, at the cost of more rolling drag on smooth pavement.
Key specs
| Wheel size | 20 x 2.125, ETRTO 57-406 |
|---|---|
| Features | 30 TPI casing, protective layer under tread, carbon steel folding bead |
Specs can change between model years; confirm the exact version before buying.
Strengths
- Open knobbed tread
- Protective puncture layer
- 30 TPI casing
- Folding carbon steel bead
Limitations
- Single tire, not a pair
- More rolling drag on pavement
- Knobs can feel noisy
Consider it if
- Mixed dirt and pavement
- Mud-prone paths
Skip it if
- Smooth paved-only riders
- Quiet rolling seekers
Best Matching Pair2 of 2
WEEROCK Colorful 20 x 2.125 (57-406) Folding Bike Tires, 2 Pack
Two 57-406 folding tires with a concave-convex tread and a stated 40 to 50 PSI inflation window.
Best for
Matching two wheels on a paved-path trike
Why we like it
The WEEROCK pack holds two 20 x 2.125 tires coded 57-406 with a folding bead, aimed at 20 inch bikes, BMX and kids bikes. The maker states a 40 to 50 PSI window and describes a concave-convex tread that aids grip when climbing and turning.
It gives a matched pair at once, which suits two rear wheels, and a clear pressure window that the Hycline does not state. It lacks the protective layer claim, so it is better for pavement and light paths than for thorns or gravel.
Key specs
| Wheel size | 20 x 2.125, ETRTO 57-406 |
|---|---|
| Features | 40 to 50 PSI window, folding bead, concave-convex tread, 2 pack |
Specs can change between model years; confirm the exact version before buying.
Strengths
- Two tires per pack
- Stated 40 to 50 PSI
- Folding bead
- Grip pattern for turns
Limitations
- No puncture layer claim
- Colorful styling not for everyone
- Tubes not mentioned, so check first
Consider it if
- Matching rear wheels
- Paved bike paths
Skip it if
- Thorny or gravel routes
Spec Comparison
Key figures side by side. A dash means the brand gives no figure, so ask before you buy if it matters to you.
| Model | Wheels | Features | Link |
|---|---|---|---|
| Hycline 20 x 2.125 (57-406) Folding Mountain Bike Tire Best for Mixed Surfaces | 20 x 2.125, ETRTO 57-406 | 30 TPI casing, protective layer under tread, carbon steel folding bead | Check price |
| WEEROCK Colorful 20 x 2.125 (57-406) Folding Bike Tires, 2 Pack Best Matching Pair | 20 x 2.125, ETRTO 57-406 | 40 to 50 PSI window, folding bead, concave-convex tread, 2 pack | Check price |
How We Chose These 20 X 2.125 Bicycle Tires for Tricycles
- True 2.125 tires
- A product had to be an outer tire sized 20 x 2.125, coded 57-406. Plain tubes went to the tube article since they provide no tread.
- Stated pressure range
- A published PSI window lets a rider set pressure for load. One tire states it, and the other does not, which we noted.
- Puncture protection
- A stated protective layer or a higher TPI casing signals puncture margin. We weighed such claims against each maker's own baseline.
- Tread and bead
- Tread pattern affects scrub at low speed, and a folding bead eases storage. We matched each tread to its likely surface.
What to Look for in a 20 X 2.125 Bicycle Tires for Tricycles
Reading 57-406
A 20 x 2.125 tire is coded 57-406: 57 millimeters of casing width on a 406 millimeter bead seat, which is a true 20 inch rim.
Read your current sidewall and match both numbers, since some 20 inch rims use a different bead diameter. A photo of the marking helps when ordering.
Tread and a trike's turns
A trike front wheel scrubs through corners, so tread bite affects how the steering feels at low speed more than on a bicycle.
Open knobs grip loose ground but add rolling drag on pavement. A smoother concave-convex tread rolls easier on paved paths. Match the tread to your most common surface.
Pressure window
A wide casing runs at lower pressure than a lean one, and a stated 40 to 50 PSI window gives a starting point for load and comfort.
A rider carrying cargo should stay near the top of the range to avoid rim strikes. For light errands, drop toward the bottom for more cushion.
Puncture layer and TPI
TPI counts threads per inch in the casing, and a protective layer under the tread adds a barrier against thorns and glass.
A higher TPI casing is more supple, while a protective layer adds stiffness. Check whether the maker states the layer, as the Hycline does, when thorns are common.
How to Choose
By Riding Surface
| Situation | Our pick | Why |
|---|---|---|
| Dirt paths and mud | Hycline 20 x 2.125 (57-406) Folding Mountain Bike Tire | Open knobs clear mud and bite loose soil |
| Thorn-prone gravel routes | Hycline 20 x 2.125 (57-406) Folding Mountain Bike Tire | Protective layer is stated to add puncture strength |
| Smooth paved paths | WEEROCK Colorful 20 x 2.125 (57-406) Folding Bike Tires, 2 Pack | Smoother tread rolls easier on pavement |
| Two matching rear wheels | WEEROCK Colorful 20 x 2.125 (57-406) Folding Bike Tires, 2 Pack | Two tires in one pack |
Knobbed vs Smoother Tread
- Knobbed
- The Hycline tire has open aggressive knobs that clear mud and bite soil, with tight convex knobs for hard roads. The trade is more rolling drag and some noise on pavement.
- Smoother concave-convex
- The WEEROCK tire uses a concave-convex pattern for grip when climbing and turning, which rolls easier on pavement. It grips loose ground less than a knobbed tire.
Most trike owners on paved paths should default to the smoother tread unless dirt is part of the route.
For Cushion-First Trikes Specifically
- Look for
- A 57-406 casing for width, a stated pressure window for tuning cushion, and a folding bead for storage.
- In this comparison
- Both tires are 57-406 with folding beads, and the WEEROCK adds a 40 to 50 PSI window. Measure fender clearance before fitting a 57 millimeter casing.
When to Spend More
- Spend more if
- You ride thorny or loose surfaces. The Hycline tire states a protective layer and a 30 TPI casing, which a plain pair does not.
- Save if
- You ride smooth paved paths. The WEEROCK pair gives two matched tires at once, which covers both rear wheels for easy riding.
Frequently Asked Questions
Will these tires fit a 20 inch trike wheel?
Both are coded 57-406, which is a true 20 inch rim. Check your current sidewall code first, because some 20 inch rims use a different bead seat.
Do these tires come with tubes?
Neither tire is described as coming with tubes, so plan to buy matching ones. A 2.125 to 2.40 band is the closest fit for a 57-406 tire, which is covered in the sibling tube article.
What pressure should I run?
The WEEROCK pair states 40 to 50 PSI. The Hycline does not give a window here, so follow the number printed on its sidewall and stay inside it.
Can I mix the knobbed and smooth tires?
It is better to match tires on the same axle, since different treads change grip and steering feel. Use one style per axle.
Do folding beads matter on a trike?
They matter for storage and shipping, since the tire coils flat. A steel bead is stiffer and cheaper, while a folding bead saves space in a basket or cupboard.
Bottom Line
For mixed surfaces, the Hycline 57-406 folding tire is the better pick thanks to its open knobs, protective layer and 30 TPI casing. The WEEROCK pair suits paved paths with a stated 40 to 50 PSI window. Plan for tubes and check fender clearance for a 57 millimeter casing first.