Mission

After two decades of hands on mechanical design and engineering experience for many of the premier MTB suspension companies and four decades of riding and playing on two and four wheels on dirt, mud, and snow, OSO has learned exactly what we want and, equally, do not want in a product. Every company seems to have their compromises, turnover, and bottom lines that don't always result in what's best for the end consumer. OSO saw enough of this and realized it was getting more difficult to find products worth spending their money on, knowing their shortcomings in quality, design, and experience, so it was time to take the leap and go solo.

OSO's mission is to provide consumers with high-quality products that meet our standards and expectations and will ensure we get you out charging your favorite trails. Being engineering-based, we ensure our products aren’t described by unnecessary marketing jargon and flash, and are produced and presented based on facts and experience. We design what we would want to use ourselves, while working with the needs and expectations of the most elite athletes in the industry. With the correct balance of quality and performance, we will only provide products that meet the demands of the most experienced user, while keeping things pure and simple for everyone.

BMX Roots 1977

In the middle with my first trophy with big brothers by my side showing me the way!!!

Tahoe - Lake Richardson circa 1989

Winter fun with Dad and older brothers.

Rubicon circa 1993

Finishing up another Rubicon trip with Dad and brothers. Moto died and we 'carried' it out!

FOX R&D

With Fabien Barel testing first DHX in his backyard track north of Nice, in between Worlds in Switzerland and WC finals in Austria 2003

2005 Mammoth Nationals

Pinning it on race run on Turner DHR, feeling the flow.

Norcal Champs Super D 2006

Quick shot right before winning race run in Toro Park.

Always testing, Specialized days in Soquel Demo 2007.

Photoshoot - X Fusion 2010

sweet pic from Justin Brantley on Saratoga Gap trail.

Chico - Bidwell Park

Flashback ride through the old trails from college.

Roots

OSO (Off Street Only) Components, started in 2011, was born from a passion and desire to design and produce high quality products.

Team

Anthony Trujillo

Off Street Only - OSO Components (2011-Present) - Founder/Engineer

A list of customers with brief details can be seen on the Clients page.

Specialized Bicycle Components (2021-2025) - Senior Suspension Engineer

Fixed and made improvements to MY21-22 RockShox SID PS-TA Brain cartridge for 100mm and 110mm travel fork
100% designed and developed new rear Future Shock pull thru-shaft damper for MY22 Diverge STR.
Designed and developed new air spring technology for MY22 Epic World Cup bike via the RockShox WCID shock.
Designed and developed GENIE shock technology and worked with FOX to see it through to production on SJ15 and Levo 4 bikes.
Designed and developed various other proprietary and patentable technologies.

Tenneco Marzocchi (2012) - Sales/Engineering/Marketing

Brought in during a very sensitive transitional state that quickly exposed all aspects of the company, past and present.
Supported Sales, Marketing, and Engineering during a critical time of rebuilding and rebranding.

Hosmer Dorrance Corporation (2012) - Senior Mechanical Engineer

Hydraulics expert for Raize and Endurance damper units.

XFusion Shox (2009-2011) - Engineering & Product Manager

Fixed and made improvements to Velvet and Vengeance fork chassis, dampers and air springs, HiLo seatpost, and Vector series of rear shocks.
Designed new Vector Air DH and O2 series of shocks.
- Introduced new extra positive volume (XV) air sleeve configuration to help with heat dissipation, which was later seen and still in use by BOS Suspension on their rear MTB shocks. The XV sleeve was larger in diameter and positioned toward the eyelet and did not run the full length of the air sleeve.
- Introduced new extra negative volume sleeve configuration to keep a lighter chassis than using an extra sleeve, which was later seen and still in use by both RockShox and FOX on their rear MTB shocks, as well as BOS.

Specialized Bicycle Components (2006-2009) - Senior Suspension Engineer

Implemented needed improvements to existing Enduro, SJ, and Epic SBC Brand rear shocks.
Designed new Brain configuration for Epic and SJ resulting in US Patent 8336683.
Designed new micro chassis for Epic resulting in US Patent 8276719 and being ridden into a World Championship XC gold as a prototype and later first Olympic XC gold. Oversized eyelet design for increased positive volume was later seen and still in use by FOX on their rear MTB shocks as LV (large volume) eyelets. Micro chassis design was later seen and still in use by XFusion on their Microlite series of rear MTB shocks.

FOX Racing Shox (1998-2006) - Senior Suspension Engineer

Designed and/or developed to production the following rear shocks: FLOAT RL, 1st gen Remote Lock Out, 1st gen ProPedal for Vanilla and FLOAT series, Itch for Specialized Enduro, TALAS for Trek Fuel, AVA air sleeves, DHX air and coil series, and Van R.
Worked with and tuned on the US National and World Cup circuits for all level of riders, including top professionals Fabien Barel, Brian Lopes, Marla Streb, Nathan Rennie, Jared Graves, Justin Leov, John Kirkaldie, Joel Panozzo, Jill Kintner, Wade Bootes, and many others.