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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23
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For Your Every Summer RSVP, with Code: SUMMER15
Description
20" x 4.0" Bike Inner Tubes - Schrader Valve, Butyl Rubber - 2 Pack20x4. 0 Bike Inner Tubes Schrader Valve, Butyl Rubber Pack of 2 Key Features Package Contents: Two (2) inner tubes Material: High quality butyl rubber for superior air retention and puncture resistance Valve Type: Schrader (AV) Valve Length: 32mm Construction: Heavy duty, increased thickness for durability ETRTO Size: 89 102 406 Replaces Cross Reference Part Numbers This product is a direct replacement for inner tubes used in tires marked with the
20x4.0 Bike Inner Tubes - Schrader Valve, Butyl Rubber - Pack of 2
Key Features
- Package Contents: Two (2) inner tubes
- Material: High-quality butyl rubber for superior air retention and puncture resistance
- Valve Type: Schrader (AV)
- Valve Length: 32mm
- Construction: Heavy-duty, increased thickness for durability
- ETRTO Size: 89/102-406
Replaces / Cross-Reference Part Numbers
- This product is a direct replacement for inner tubes used in tires marked with the following sizes:
- 20 x 3.5
- 20 x 3.6
- 20 x 3.8
- 20 x 4.0
Compatibility & Fitment
- Tire Diameter: 20 inches
- Tire Width Range: 3.5 inches to 4.0 inches
- Valve Requirement: Fits bicycle rims drilled for Schrader valves
- Primary Application: Fat tire bikes, electric bicycles (E-bikes)
When to Replace
- Visible punctures, cuts, or abrasions on the tube surface.
- Consistent loss of air pressure after inflation.
- Tube develops a bulge or deformity.
- Valve stem is cracked, damaged, or leaking at the base.
- After a severe impact or pinch flat, as a preventative measure.
Installation Tips
- Before installing, carefully inspect the interior of the tire for thorns, glass, or other sharp debris.
- Confirm the rim strip is in good condition and correctly covers all spoke holes.
- Lightly inflate the new tube before inserting it into the tire to give it shape and prevent pinching under the tire bead.
- Ensure the valve stem is straight and perpendicular to the rim.
- Seat the tire bead evenly on both sides of the rim before inflating to the recommended pressure.
- Inflate to the PSI specified on the tire's sidewall, not on the inner tube.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 5
Fit and comfort
Color: Multicolor-6pack-01, Size: Large
Perfect fit and coverage. Soft cotton material.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2026
★★★★★ 5
No wedgies or pinching.
Color: Multicolor-6pack-01, Size: Large
Finally panties that deliver without causing wedgies or a muffin top. The full coverage design stays in place all day without pinching around your legs & waistband is very thin to give you a smooth silhouette
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Reviewed in the United States on April 24, 2026
★★★★★ 5
Comfortable and cool. Does not ride up.
Color: 01-multicolour (4-pack), Size: Medium
Extremely comfortable. Stays cool. Ample coverage. Quality material. They do not creep up. I ordered a medium which I generally take a size small. I have reordered and will reorder again to add more colors to my collection.
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Great Value for Cool Thigh Protection
Color: 02-multicolour (4-pack), Size: XX-Large
For the price, I'm not sure there are better women's boxer shortlettes anywhere. I've tried more expensive brands, and for quality and cooling, these are right up there. I have other bamboo viscose undies that still get gross when I get sweaty in the summer, but these, with the large mesh panel, really help wick away a lot of that moisture, keeping you feeling dryer and cooler. I find that the leg openings are comfortable and don't roll up! and the waist band doesn't dig, nor does it roll down. These do not provide any compression, and I wasn't looking for any. I just wanted some cooling, thigh protecting women's boxers that wouldn't break the bank. These are them! Bonus- I've washed them and put them in the dryer (following their instructions), and they haven't shrunk; they look about the same and are nice and soft.
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Reviewed in the United States on July 28, 2025
★★★★★ 4
Great for the entire family but expensive
So far so good. The brand of boxers we had been buying changed their style and construction so we needed to find an alternative. These have held up well so far to multiple weeks of frequent washing and wearing from the entire family. We did size up from the usual 6/M we normally buy and ordered large to prevent the legs from rolling up which worked out great. Our daughter likes the length and how soft the fabric is for wearing under skirts and gym shorts and liners stay put without moving or leaking as another reviewer mentioned. Our son says they are comfortable and fit well being just supportive enough without being constrictive. We all agree that there seems to be not enough fabric in the back as they tend to be much tighter across the backside than the front and that also causes the waist band to ride lower in the back than the front. These have better seam placement than some brands we tried with no seam across the lady bits and no seam down the middle of the back side so they are more much comfortable but the cost is also much higher and that is why we're only giving it 4 stars. These will stay in the rotation until we find something cheaper that both us and the kids like.
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Reviewed in the United States on January 24, 2026
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