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Our Entire On-Line Catalog

- Fully removable aluminum valve - Anodized red color - Intended for use with 320 tpi Vittoria tubular tires, Rubino Pro inner tubes, and latex inner tubes - 42mm, 60mm, 80mm, and 110mm lengths - Sold as a pair

At Yoyodyne Propulsion Systems the goal has always been to provide bespoke research and development services outstanding in our own industry and in the eyes of our customers. Yoyodyne was founded  in 1938 at Grovers Mills New Jersey with a mandate to be different and infinitely better.

We started by defining the Yoyodyne look for contract research and development: The look reflects the promise to serve with diligence and perform with expertise. Scientists meet their public in tailored suits, shirt and tie, patent leather polished shoes; strict attention to appearance establishes credibility and instills confidence.

We systematically train, check, and measure the performance of our personnel and services with an emphasis on the following: Be proactive in developing creative solutions to our customer's defence and aerospace needs. Think and act professionally at all times. Communicate with respect. Have a thorough knowledge of the client's technical specifications. Know and be known.

These principals are now in our company’s DNA, providing Yoyodyne a distinct and discernible differentiator when it comes to contract research services. However, those attributes might not be enough. We must do more.

Our mission today is to validate that Yoyodyne Propulsion Systems and the products we generate will make a positive impact on our customer’s revenue growth, sustainability, and shareholder value. We must be a profit center for your business, not a cost.

In the world of the RFP and the power of the lowest price,Yoyodyne's brand of science will not be right for all. Yet for those who are willing to investigate whether or not  inspired basic research in weapons or propulsion systems could make an impact on issues such as defence or aerospace, profit and loss, we encourage a closer inspection.  Welcome to Yoyodyne.

Yoyodyne Propulsion Systems is proud to offer the new model Interocitor Mark IV.

Offering significant upgrades to the 451F model, Mark VI production has been moved to Yoyodyne's Grover's Mills, New Jersey Aerospace facility. The current line of Interocitors continues to incorporate greater advances than hitherto known in the field of electronics. At the same time Yoyodyne engineers, according to production manager John Bigboote, have improved performance they are able to design the Mark VI to incorporate 20% fewer parts than the 2486 required for the 451F with a concomitant improvement in reliability. The most popular production models are still available including those incorporating a planetary generator, a volterator, an astroscope, and (always popular with home makers) the electron sorter. Dr. Cal Meacham, despite the shift of production from his Ryberg facility, maintains a 49% equity stake in all Interocitor models as well as his position as chief scientist in charge of design. Chief of R&D, John Carefulwalker, references benchmark rates of four lane road construction in the 30 to 45 second/mile range verses two to three minutes for the 451F. If you have been thinking of adding an Interocitor to you defense, communications, or energy management systems: If you have reached the limits of your 451F's capabilities and are looking for an upgrade: If you have some spare room in your garage or shop:

It is time to experience life with a Yoyodyne Propulsion Systems Interocitor Mark VI.

As you know, matter is composed mostly of empty space, right down to the quantum level: within an atom, most of that atom's total volume consists of relatively vast spaces between the subatomic particles, although the particles do remain tethered to each other by electromagnetic force. Early quantum theory suggests that EM force may consist of "virtual photons" that have no mass and naturally fill such otherwise empty spaces. The overthruster powers two colliding beams (one stream of electrons, one of positrons) which annihilate each other, creating create intermediate vector bosons as a by-product. The vector bosons are then magnetically collected and focused into another beam, now capable of imparting mass to those pesky virtual photons, thereby weakening the EM force that binds matter. Everything reverts to normal pretty quickly, but a fast-moving object (such as Buckaroo's jet car) can pass through the affected matter before the window closes. Greater detail can be found in "Moving Through Matter with Buckaroo Banzai" by Dr. Cary I. Sneider of the Lawrence Hall of Science at Berkeley, first presented at a National Science Teachers Association convention in Boston in April 1984.
$0.25
Manufactured out of 18-8 stainless steel, we can custom cut and thread your Phil Wood spokes from 40 to 310mm in 1mm increments on our Phil Spoke Cutting & Threading Machine while you wait. All Phil Wood spokes have a limited lifetime warranty against breakage and come with Phil Wood Spoke nipples. Prices are from $1 (14g un-butted silver wi/brass nipple) to $2.5 per spoke.
$1.00
- Straight gauge 2.0mm with cold forging technology - Chrome nickel stainless steel with rolled threads - 222g @ 32h/265mm - Box of 100 - Nipples sold separately
$1.80 - $5.00 $5.00 Up to 64% Off
Wheels Manufacturing Outer Axle Nuts are high-grade steel nuts that provide secure wheel fixing for solid-axle wheels. - 14mm x 1mm (1411-AN) sold in pairs - All others sold individually
$2.00 - $10.00
Park Tool's Replacement Chain Tool Pin (2-Pack) fits Park Tool's CT-1, CT-2, CT-3, CT-3.2, CT-5, and CT-7 Chain Tools. • Made from hardened alloy tool steel • Uses 7mm or 9/32" 12 pt box end/socket • Sold singly or in pairs
$2.00
This is a single replacement pin for Park Tool HCW-4 and SPA-6 pin spanner wrenches.
$2.00
Shimano Front Derailleur Cable Fixing Assembly
$2.75 - $3.00
- Machined aluminum spacers for tuning stem height - Black spacers with white FSA graphic - 5mm and 10mm Spacers are sold individually - 1-1/8" Spacer Kit includes: (3) 3mm, (4) 5mm, (3) 10mm, (2) 20mm
$2.99 $2.99 - $5.00 Up to 40% Off
The Problem Solvers Axle Nut is perfect for wheels with solid axles (also called bolt-on axles). This quality nut is made of durable chrome-plated steel and features a built-in integrated rotating washer to hold tight.
$3.00 $5.00 40% Off
Campagnolo Fixed U-Shape Spring Support Caliper Brake Part
$3.49 $5.00 30% Off
These double ended cables have a unique disc style head that fits Simplex/Huret and a normal Shimano/SRAM head. - Galvanized - Pre-stretched - Double ended - Cable Head: Shimano/SRAM, Huret/Simplex - Defined Color: Silver - Diameter: 1.2mm - Double Ended: Yes - Disc style Huret/Simplex end is slightly smaller than original spec, but is functionally compatible with Suntour X-Press shifters
$3.94 $10.00 61% Off
Aluminum headset stack spacers precision cut to ensure proper headset function. - Precision cut for proper function
$4.00
If you own an Air-Bob inflator, you probably use it A LOT. If you need to replace the original pump head o-ring, no problem, here's the replacement part to get you back up and running.
$4.00 - $20.00 $4.00 - $25.00 Up to 20% Off
The Product that Started a Tubeless Revolution Inside this simple bottle is a product that changed cycling. Today's tubeless systems rely on the lighter, more reliable, self-sealing performance of Stan's Tire Sealant. Just two ounces of Stan's in a converted standard tire or tubeless tire can repair punctures up to 1/4-inch almost instantly to keep you rolling. Longer-lasting Stan's Tire Sealant is formulated to stay liquid in tires with even thin casings for up to seven months. Arid conditions require more frequent monitoring of sealant levels, but anti-freezing agents in our special formula allow Stan's Tire Sealant to be used in temperatures as cold as -30° F. One quart will convert up to 16 tires. - First choice of riders around the world for tubeless conversion and flat prevention - Seals punctures up to 1/4-inch (6.5mm) quickly - Stays liquid 2-7 months for long-lasting protection - Premium low-viscosity formula resists freezing to work in environments as cold as -30° F (-34° C) - Natural materials, safe for the environment - Can be injected through valve stems with removable cores compatible with tubes and tubular tires
$4.99
Designed for long-term use and durability, the Finish Line Mechanic Grip Gloves provide the ultimate in grip, protection, and dexterity. These reusable gloves make it easier to work on small, precision bike parts. Mechanic Grip Gloves are latex-free and feature a tactile-enhancing polyurethane coating that seals out grease, oil and grime. A textured surface on the palm-side of the glove provides enhanced grip, making it easier to work on small parts. Finish Line Grip Gloves feature a breathable upper fabric, which helps keep hands cool and dry. Mechanic Grip Gloves are easy to take on and off, so gearing up and down for mechanical repairs has never been easier. Unlike costly single use gloves, one pair of Grip Gloves can last for many weeks.
$4.99 $10.00 50% Off
Pack of 10 replacement tubeless plugs for the Tubeless Kit and Classic Tubeless Kit.
$4.99 $5.00 On Sale
Single sided, bottom bracket mounted cable guide, with integrated cable housing stop. - Intended to fit 40mm diameter bottom bracket shells - Includes M5 mounting bolt - Direct replacement for: Salsa Vaya, Salsa Warbird (Alloy), Salsa Journeyman, All-City Cosmic Stallion, - All-City Gorilla Monsoon, All-City Macho King, All-City Space Horse Disc
$5.00
The Campagnolo Adjustable U-Shape Spring Support Caliper Brake Part
$5.00
Parts for repair and maintenance of DT Swiss hubs. - DT Swiss Star Ratchet Spring
$5.00
A non-tubeless protective strip to cover the spoke holes in your ENVE carbon clinchers. 
$5.00 $7.00 29% Off
FSA Mega Exo Small Parts.
$5.00
Tight tolerances and precise torque specs mean precision parts like this MegaExo 12 Left Arm Crank Bolt need to be replaced from time to time. Make sure the heart of your drivetrain is secure, and pick up a spare or two today.
$5.00
This is a MegaExo Left Crank Bolt for 19mm MegaExo Cranks. - M12 bolt
$5.00
Origin-8's Carbon Fiber Headset Spacers are made of lightweight, durable carbon and come in 5mm, 10mm or 20mm thicknesses. You get a bag of five spacers.
$5.00
There’s no easier or more effective way to patch a cut tire on the road or trail than carrying and using Park Emergency Tire Boots (3 per package). These thin, extra-tough patches peel and stick to the insides of tires to repair cuts and contain the tube until you can replace the tire.
$5.00
- Attaches to rear racks - Compatible with: Blinky 3,5,7 and Superflash - 25mm between each of the top horizontal holes (center to center) - Requires an "L bracket" that typically comes with a rear rack. If your rack is missing the L bracket, you can purchase Planet Bike's rack hardware pack