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AZUSA TUBE #7121 3.50/4.00-8

$11.50/Each
Part# 7121
MFR Model# 7121

Overview

Inner Tubes for most Azusa variety tires

Reviews

Mounted and ready to go. Weather permitting they will get a testing, but fit, and ease of installation exceeded my expectations.

Hugh R
December 1, 2020

Great value

Joe S
August 14, 2020

These are a true 90 degree valve stem with the valve stem being very near the center of the tube. These tubes work very well for the Azusa 2 piece experimental wheels. The Azusa 2 piece wheel is a split wheel with the with valve stem placement in the middle of the wheel. Meaning that each half of the wheels has a 180 degree cutout for the tube valve stem. A true 90 degree valve stem is required for this application. The rubber thickness is near heavy duty on these tubes as well. Be careful as some tubes that claim they have a 90 degree stem are actually 45 degrees and the stem is offset further tpo the side of the tube.

Mike A
September 5, 2019

Nice tires they hold 80 PSI and roll my Bell 206 with ease (ground handling wheels)

Tony G
May 31, 2018

100% accuracy regarding description of item. Great shipping time and packaging.

Joe R
March 2, 2017

Nice little tire, but not very hardy. You get what you pay for..

Dan D
January 5, 2018

This tire lasted over 100 landings, so for a cheap $10 tire its been great for the money. The problem I found was when I found that it was a touch low on air pressure on the preflight of last flight I did, maybe 30 lbs instead of 50 lbs, and I mistakenly decided fly it any way. Mistake. Upon post flight inspection, there was a large bald spot on the shoulder of the tire. Hmmm, I like that this tire is light for weight and balance purposes, but Im not so sure Im going to run this tire any longer. Its a bit fragile.

Ben
November 18, 2017

Tube is of good quality, good 90 degree bend but valve is not on center. I also had to modify rim to make them work.

Roger S
February 6, 2021

NOT AIRWORTHY. Two different shipments. In each, tires were folded in upon themselves. Even when spread open after a couple of days they remained severely lopsided. ACS catalog list as Azuza Tire. Tires received indicated TON KEEP. Sidewall imprinted with Not For Highway Use. 4.10/350x5 4PLY. Shameful. Returned tires to ACS Will-Call Desk. Refund immediately provided by ACS. This is a product issue. ACS staff helpful. Complaint about ACS product sourcing and in-house product quality control in process with ACS.

Thomas K
September 29, 2020

Another reviewer said These are a true 90 degree valve stem with the valve stem being very near the center of the tube. I ordered the Azusa tube #7125, and the 90 degree valve stem was NOT even close to the center of the tube. It was about 25% of the way around the tube. I ended up modifying my wheels and moving the valve stem hole to better accommodate the offset valve stem. If I ever do end up with a proper tube, it will still fit the wheels!

Donald G
August 5, 2020

Q&A

Q: What are the weights of tire # 06-00772 and tube # 06-00773?

Tire # 06-00772 (AZUSA TIRE 4.10/350 x 4 4 PLY) is approximately 2.1 lbs. Tube # 06-00773 (AZUSA TUBE #7130 410/350 X 4) is approximately 0.4 lbs.

Q: Is tube #7116 a 90 degree bent stem?

Yes, tube 7116 is equipped with a 90 degree bent valve stem.

Q: Are 06-00075 and/or 06-01590 90° bent metal stem tubes?

06-00075 is a 90* stem. 06-01590 has a straight stem.

Q: Does the AZUSA TUBE #7121 have a bent 90 degree stem?

No, the tube 7121 has a straight valve stem.

Q: Does tube # 7138 (ULTRALIGHT & EXPERIMENTAL TUBE #7138 800 X 6) have straight valve stem?

No, this tube has a 90 degree valve stem.

Q: What is the load rating on the 3.5 x 4.1 x 6 4 ply rating tire, part # 06-00074?

The load rating is going to be 445 lbs.

Q: Are these tires and tubes certified? or are they just for experimental aircraft?

These tires are experimental as these do not fall under any certifications.

Q: How long is the stem of 06-00773? Please specify where you measure it from. My current stem is 39 mm from the outside edge of the bent or 32 mm from the inside edge of the bent.

From the 90 degree bend to the cap, the stem is approx 1-7/16 inches.

Q: Can nitrogen be used in these tubes?

We have no data supporting this tubes being used for nitrogen.

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