Skip to product information
1 of 4


Tillett B3.5 Car Seat

Tillett B3.5 Car Seat

Regular price $663.23 USD
Regular price Sale price $663.23 USD
Sale Sold out
Panel Options
Fitting Kit
  • Fast Shipping
  • Class Leading Technical Support
  • Built by Racers



The B3.5 is a lightweight and narrow single skin car seat. The main reasons for choosing a B3.5 seat would be to fit a seat in a reduced space within the car and weight saving. The B3.5 has a narrow maximum width across the leg area of 33cm and weighs approximately 2.1kg.

This is a great option for cars where obstructions such as the gearbox, lead to a reduced space surrounding the legs. If a driver does not have this space issue but needs the reclined back position, we would recommend the dual skin high-side version that is the B4. This model may weigh slightly more at 3.9kg but it allows the driver to use base mounted car seat brackets that the B3.5 cannot.

The B3.5 must have bespoke fixing points made to connect the shell to the car, contacting the seat in specific areas. (See diagram within the images for more precise understanding)  

The very reclined B3.5 is mostly used in prototype sports cars, formula cars, or race car simulators. It is extremely lightweight, and positions the driver low into the chassis, making it a perfect option to simulate a Formula car.

Product code: B3.5-40CAR


  • The B3.5 has a unique shape that allows the leg area to be as narrow as 33 cm external width. Then the upper body area under the arms 43cm for more movement and comfort. See gallery for a precise understanding.
  • Thin, ultra-lightweight single skin shell 2.1kg (weights of seat scan vary by 10%).
  • More reclined race car position.
  • Suited to track vehicles where the driver is very low, such as prototype sports cars, formula cars, or race car simulators.
  • Available to order in two finishes (See selection).
  • Full race harness and 30° Hans compatible (5 or 6 point race harness recommended).
  • This model is not self-supporting and therefore requires fixing to hard points either on the vehicle itself, a roll bar, bulkhead, or from a specially made support frame constructed by the customer.
  • A minimum of five fixing points MUST be used, two high up on the sides, at least one behind the headrest pad and two fixings in the areas under the driver’s legs (see diagram in images).
  • Dinamica® covered Headrest panel included as standard.
  • Optional Dinamica® suede covered lower cushion and back panel set (Panel set weight is approximately 0.9kg).
  • All seat panels are customisable at an additional charge, see product page SP1 or SP2 for more information.
  • Tillett car seat brackets are NOT compatible with any single skin seats.
  • Designed and manufactured in the United Kingdom.



Why Choose Us

We understand the intricacies of racing from firsthand experience and strive to bring authenticity to everything we do. Become part of a team that is committed to the sport they love and discover the difference.

Our values

  1. Precision
  2. Innovation
  3. Customer-Centricity
  4. Excellence
  5. Passion

20 Years Experience

With 20 years of experience, Sims by Racers, a family-owned business since 2004, serves professional, amateur drivers, and corporate clients, enhancing driving skills. Our original simulator mirrors kart racing.

View full details

Customer Reviews

Be the first to write a review
  • Dr. Peter Attia

    “I’ve worked with Sims By Racers since 2015 and I can’t say enough about the quality of my simulators—I’ve bought two— and perhaps more importantly the quality of Sims By Racers customer service...

    Read more 
  • Jeff Porasik

    “I just finished putting my race simulator together. Shout out to Sims By Racers for building it and getting up and running. Great products and service. If you’re looking to put one together don’t hesitate to contact them.”

    Read More 
  • Rob Howden

    “If you’re looking to dive into the sim racing world, and let’s be real, it’s only going to get big and better, contact my friends at Sims By Racers. They build top-level sim PCs and they have high quality affordable rigs. They saved me during the initial Road to Indy eSeries last year with a super fast PC and their customer service is second to none. #BookIt”

    Read More 
1 of 3