The 26 x 1 3/8 tire size is a distinct standard, not the common 26-inch mountain bike tire. Its 37-590 mm bead seat diameter (BSD) makes it a specific fit for vintage three-speeds, older cruisers, and some city commuters. Getting the sizing wrong means the tire simply will not seat on the rim, so precise identification is the first and most critical step before any purchase.
I’m Mohammad — the founder and writer behind ProteinJug. This guide is grounded in hours of cross-referencing ETRTO standards, analyzing tread compounds, and comparing user reports on fitment for this particular 37-590 niche.
In this guide, I break down four complete kits that include tires, tubes, and levers, each suited to different riding styles and budgets. Whether you are restoring a vintage Schwinn or refreshing a daily commuter, understanding the bead seat diameter will lead you to the right 26 x 1 3/8 bike tire for your wheels.
How To Choose The Best 26 X 1 3/8 Bike Tire
The 26 x 1 3/8 category is a unique island in the bike tire world. The most frequent mistake is confusing it with the vastly more common 26 x 1.95 or 26 x 2.0 mountain bike tire, which uses a 37-559 BSD. A 37-590 tire will not fit a 37-559 rim, and vice versa. Measure your rim’s bead seat diameter or check the sidewall of your current tire before ordering anything.
Tread Pattern and Your Riding Surface
Slick or smooth treads minimize rolling resistance on pavement, making them ideal for road bikes and city commuters on flat, dry surfaces. Directional treads, often with fine block patterns, offer a balance of low resistance and improved grip on loose gravel or damp roads. A knobby tread provides more traction on dirt paths but creates noticeable drag on asphalt. For most urban and suburban riding on paved roads, a slick or directional tread is the best choice.
Kit Components and Installation
Most quality replacements come as kits with two tires, two tubes, tire levers, and sometimes rim strips. Evaluate the inner tube’s thickness and valve compatibility: a 1.25 mm butyl rubber tube resists punctures better than thinner alternatives, and a 32 mm Schrader valve fits standard rims. Folding beads make storage and installation easier, but ensure the bead wire straightens after unpacking to avoid a wobbly mount.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Midcos 26×1 3/8 | Mid-Range Kit | All-Round Urban Commuting | Directional Tread, 60 PSI Max Pressure | Amazon |
| Hycline 26X1 3/8 | Premium Kit | Vintage Restoration & Durable Road Use | Knobby Tread, 65 PSI Max Pressure | Amazon |
| SIMEIQI 26×1 3/8 | Value Kit | Budget-Friendly Replacement | Slick Tread, Carbon Steel Bead | Amazon |
| YunSCM Pink 26×1 3/8 | Style Kit | Vintage Cruiser Style & Solid Build | Slick Tread, 1.38 Inch Width | Amazon |
In‑Depth Reviews
1. Midcos 26×1 3/8 Bike Tires Kit
The Midcos kit delivers a strong balance of rolling efficiency and grip with its dense block-shaped directional tread. The pattern provides decent traction on climbs and turns while keeping noise low on pavement, making it a solid match for daily urban routes and occasional park paths.
Each tire is constructed from high-density rubber with nylon cord reinforcement, and the inner tube boasts a 1.25 mm butyl rubber wall thickness for improved puncture resistance. The kit includes two tires, two tubes, and two tire levers, so you have everything needed for a full wheelset swap without extra purchases. One user noted a slightly tight fit on the rim, which is common with new tires and helps ensure a secure bead lock.
The 60 PSI maximum inflation pressure offers a firm ride for road use. Keep in mind that the manufacturer notes this tire is not suitable for Schwinn models from the 1960-1980s, so always verify your rim’s compatibility before purchase.
Why it’s great
- Directional tread balances low rolling resistance with cornering grip
- 1.25 mm butyl rubber inner tubes resist punctures effectively
- Complete kit with tubes, tires, and levers simplifies the replacement process
Good to know
- Not compatible with vintage Schwinn models from the 1960s-1980s
- Some users report a tight installation on certain rims
2. Hycline 26X1 3/8 Bike Tire Set
The Hycline set uses a classic diamond knobby tread that offers excellent grip on loose surfaces and hardpack dirt, while still performing reasonably well on pavement. Its 65 PSI max rating is the highest in this comparison, allowing riders to dial in a firmer feel for road sections.
Both tires are made from high-quality rubber with nylon cord layering for puncture and abrasion resistance. The inner tubes are standard 32 mm Schrader valve butyl rubber units, and the package includes two tire levers. A user reported the tires arrived tightly folded and took about a day to relax into full roundness, but once mounted, the bead seated securely and held air pressure well over five months of casual riding.
This kit is an excellent match for those who ride a mix of paved and unpaved paths, or for anyone restoring a vintage bike that needs a durable, classic-looking tire. The 1-year warranty from Hycline adds a layer of confidence.
Why it’s great
- Knobby diamond tread provides reliable off-road grip and mud shedding
- 65 PSI max pressure suits varied terrain from pavement to dirt
- Kit includes tires, tubes, levers, and a 1-year warranty for extra peace of mind
Good to know
- Tires arrive tightly folded and need time to relax before installation
- Knobby tread creates more rolling noise on smooth asphalt compared to a slick
3. SIMEIQI 26X1 3/8 Road Bike Tires
The SIMEIQI tires focus on minimizing rolling resistance through a slick pattern, which translates to a faster, smoother feel on paved roads and bike paths. The carbon steel bead allows the tire to fold for compact storage, a practical feature for carrying a spare or storing during winter months.
Buyers report that these tires mount easily on a range of 3-speed and department-store bikes. The kit includes two tires and tire levers, but not inner tubes, so you will need to purchase tubes separately unless you already have serviceable ones. The solid rubber compound has been noted to feel durable, and the directional mounting arrows make installation straightforward.
Because this is a slick tire, it offers minimal grip on loose gravel, wet leaves, or damp pavement. It is best suited for dry, paved urban environments where speed and low effort are the priorities.
Why it’s great
- Slick tread delivers very low rolling resistance for fast road riding
- Carbon steel bead enables folding for easier transport and storage
- Affordable two-pack with tire levers included for a simple swap
Good to know
- Does not include inner tubes; you must buy them separately
- Slick surface has limited traction on loose or wet surfaces
4. YunSCM 26×1 3/8 Pink Bike Tires and Tubes
The YunSCM kit stands out with its bright pink color, designed to add a vintage aesthetic to cruisers and city bikes. The slick tread is optimized for flat, paved surfaces, and the high butyl rubber content in the tire compound keeps the ride smooth while emitting less odor than lower-grade rubber.
This is the most comprehensive kit in terms of included accessories: two tires, two tubes, two rim strips, and a pair of tire levers with a specialized groove for valve clearance. The rim strips protect the tube from spoke nipple abrasion, a detail that lowers the risk of punctures. The tubes use a standard 32 mm Schrader valve and the tires feature a folding bead with new soft wire technology that makes installation easier once the wire is gently formed back into a circle.
One buyer noted the 1.38-inch width feels narrow by modern standards, which is accurate for a 1 3/8 tire. This is not a wide balloon tire, so it is best for paved commuting rather than off-road use. Also, the manufacturer warns against using these for extreme riding, overloading, or racing, as the warranty only covers standard road use.
Why it’s great
- Eye-catching pink color perfect for vintage cruiser or custom builds
- Kit includes rim strips for added puncture protection against spoke nipples
- High butyl rubber content provides good wear resistance and low odor
Good to know
- Slick tread offers minimal grip on loose or wet surfaces
- Narrow profile may feel less stable for riders accustomed to wider tires
FAQ
Can I use a 26 x 1 3/8 tire on a modern mountain bike rim?
Will a 26 x 1 3/8 tire fit a Schwinn from the 1970s?
Why does my new tire feel wobbly after folding?
Final Thoughts: The Verdict
For most users, the 26 x 1 3/8 bike tire winner is the Midcos 26×1 3/8 Kit because its directional tread, complete component set, and 60 PSI rating deliver reliable daily performance across urban pavement and light gravel. If you need a knobby tire for mixed terrain and want the highest pressure rating, grab the Hycline 26X1 3/8 Set. And for a budget-friendly slick option that saves money without tubes, nothing beats the SIMEIQI 26X1 3/8 Tires.