Race Tech FRSP S4430090 0.90 kg/mm Fork Spring for Harley-Davidson Motorcycles

The first step to great handling and predictability is selecting proper spring rates. With over 500 Hi-Performance Springs to choose from, Race Tech is almost guaranteed to have the spring you need. Sportbikes are generally under-sprung for the average rider, causing the bike to be unbalanced and unpredictable.

Improve front-end control and handling consistency with the Race Tech FRSP S4430090 Fork Spring. Designed with a 0.90 kg/mm spring rate, this high-performance replacement spring helps address the under-sprung characteristics commonly found on sport and touring motorcycles, particularly for average or heavier riders. The result is a more balanced, predictable feel during braking, cornering, and everyday riding.

Manufactured by Race Tech from chrome silicon wire, this fork spring delivers a high stiffness-to-mass ratio while maintaining reliable long-term performance. Each spring is shot-peened and heat-treated for durability, accurate spring rates, and resistance to sacking out over time. It is engineered for riders seeking a properly matched front suspension setup and more controlled fork response.

The Race Tech FRSP S4430090 fits select Harley-Davidson models, including the 2014-2015 FLHR Road King, 2015-2016 FLHTCUL Electra Glide Ultra Classic Low, 2015-2017 FLHTKL Electra Glide Ultra Limited Low, and 2015-2017 FLTRXS Road Glide Special. Verify the motorcycle model, year, and required spring rate before installation. Race Tech is the manufacturer and brand, and FRSP S4430090 is the manufacturer and vendor part number.

Features:

• Spring Rate: 0.90 kg/mm for improved front suspension control and predictable handling
• Material: Chrome silicon wire for strength and performance
• Construction: Shot-peened and heat-treated for enhanced durability
• Performance: High stiffness-to-mass ratio supports responsive suspension action
• Consistency: Accurate spring rate helps maintain balanced motorcycle handling
• Durability: Designed to resist sacking out during extended use
• Fitment: Fits select 2014-2017 Harley-Davidson Road King, Electra Glide Ultra Classic Low, Electra Glide Ultra Limited Low, and Road Glide Special models
• Brand: Race Tech
• Manufacturer Part Number: FRSP S4430090
• Vendor Part Number: FRSP S4430090

Fitment:
2014 Harley Davidson FLHR Road King
2014 Harley Davidson FLHRSE CVO Road King
2014 Harley Davidson FLHTCU Electra Glide Ultra Classic
2014 Harley Davidson FLHTK Electra Glide Ultra Limited
2014 Harley Davidson FLHTKSE CVO Limited
2014 Harley Davidson FLHX Street Glide
2014 Harley Davidson FLHXS Street Glide Special
2015 Harley Davidson FLHR Road King
2015 Harley Davidson FLHTCU Electra Glide Ultra Classic
2015 Harley Davidson FLHTCUL Electra Glide Ultra Classic Low
2015 Harley Davidson FLHTK Electra Glide Ultra Limited
2015 Harley Davidson FLHTKL Electra Glide Ultra Limited Low
2015 Harley Davidson FLHTKSE CVO Limited
2015 Harley Davidson FLHX Street Glide
2015 Harley Davidson FLHXS Street Glide Special
2015 Harley Davidson FLHXSE CVO Street Glide
2015 Harley Davidson FLTR Road Glide
2015 Harley Davidson FLTRUSE CVO Road Glide Ultra
2015 Harley Davidson FLTRX Road Glide Custom
2015 Harley Davidson FLTRXS Road Glide Special
2016 Harley Davidson FLHR Road King
2016 Harley Davidson FLHTCU Electra Glide Ultra Classic
2016 Harley Davidson FLHTCUL Electra Glide Ultra Classic Low
2016 Harley Davidson FLHTK Electra Glide Ultra Limited
2016 Harley Davidson FLHTKL Electra Glide Ultra Limited Low
2016 Harley Davidson FLHTKSE CVO Limited
2016 Harley Davidson FLHX Street Glide
2016 Harley Davidson FLHXS Street Glide Special
2016 Harley Davidson FLHXSE CVO Street Glide
2016 Harley Davidson FLTR Road Glide
2016 Harley Davidson FLTRU Road Glide Ultra
2016 Harley Davidson FLTRUSE CVO Road Glide Ultra
2016 Harley Davidson FLTRXS Road Glide Special
2017 Harley Davidson FLHR Road King
2017 Harley Davidson FLHRC Road King Classic
2017 Harley Davidson FLHRXS Road King Special
2017 Harley Davidson FLHTCU Electra Glide Ultra Classic
2017 Harley Davidson FLHTK Electra Glide Ultra Limited
2017 Harley Davidson FLHTKL Electra Glide Ultra Limited Low
2017 Harley Davidson FLHTKSE CVO Limited
2017 Harley Davidson FLHX Street Glide
2017 Harley Davidson FLHXS Street Glide Special
2017 Harley Davidson FLHXSE CVO Street Glide
2017 Harley Davidson FLTR Road Glide
2017 Harley Davidson FLTRU Road Glide Ultra
2017 Harley Davidson FLTRXS Road Glide Special
2018 Harley Davidson FLHR Road King
2018 Harley Davidson FLHRXS Road King Special
2018 Harley Davidson FLHTCU Electra Glide Ultra Classic
2018 Harley Davidson FLHTK Electra Glide Ultra Limited
2018 Harley Davidson FLHTKL Electra Glide Ultra Limited Low
2018 Harley Davidson FLHTKSE CVO Limited
2018 Harley Davidson FLHX Street Glide
2018 Harley Davidson FLHXS Street Glide Special
2018 Harley Davidson FLHXSE CVO Street Glide
2018 Harley Davidson FLTR Road Glide
2018 Harley Davidson FLTRU Road Glide Ultra
2018 Harley Davidson FLTRXS Road Glide Special
2018 Harley Davidson FLTRXSE CVO Road Glide
2019 Harley Davidson FLHR Road King
2019 Harley Davidson FLHRXS Road King Special
2019 Harley Davidson FLHT Electra Glide
2019 Harley Davidson FLHTCU Electra Glide Ultra Classic
2019 Harley Davidson FLHTK Electra Glide Ultra Limited
2019 Harley Davidson FLHTKL Electra Glide Ultra Limited Low
2019 Harley Davidson FLHTKSE CVO Limited
2019 Harley Davidson FLHX Street Glide
2019 Harley Davidson FLHXS Street Glide Special
2019 Harley Davidson FLHXSE CVO Street Glide
2019 Harley Davidson FLTR Road Glide
2019 Harley Davidson FLTRU Road Glide Ultra
2019 Harley Davidson FLTRXS Road Glide Special
2019 Harley Davidson FLTRXSE CVO Road Glide
2020 Harley Davidson FLHR Road King
2020 Harley Davidson FLHRXS Road King Special
2020 Harley Davidson FLHT Electra Glide
2020 Harley Davidson FLHTK Electra Glide Ultra Limited
2020 Harley Davidson FLHTKSE CVO Limited
2020 Harley Davidson FLHX Street Glide
2020 Harley Davidson FLHXS Street Glide Special
2020 Harley Davidson FLHXSE CVO Street Glide
2020 Harley Davidson FLTR Road Glide
2020 Harley Davidson FLTRK Road Glide Limited
2020 Harley Davidson FLTRX Road Glide Custom
2020 Harley Davidson FLTRXS Road Glide Special
2020 Harley Davidson FLTRXSE CVO Road Glide
2021 Harley Davidson FLH Electra Glide
2021 Harley Davidson FLHR Road King
2021 Harley Davidson FLHRXS Road King Special
2021 Harley Davidson FLHTK Electra Glide Ultra Limited
2021 Harley Davidson FLHTKSE CVO Limited
2021 Harley Davidson FLHX Street Glide
2021 Harley Davidson FLHXS Street Glide Special
2021 Harley Davidson FLHXSE CVO Street Glide
2021 Harley Davidson FLTRK Road Glide Limited
2021 Harley Davidson FLTRX Road Glide Custom
2021 Harley Davidson FLTRXS Road Glide Special
2021 Harley Davidson FLTRXSE CVO Road Glide
2022 Harley Davidson FLHR Road King
2022 Harley Davidson FLHRXS Road King Special
2022 Harley Davidson FLHT Electra Glide
2022 Harley Davidson FLHTK Electra Glide Ultra Limited
2022 Harley Davidson FLHX Street Glide
2022 Harley Davidson FLHXS Street Glide Special
2022 Harley Davidson FLHXSE CVO Street Glide
2022 Harley Davidson FLHXST Street Glide ST
2022 Harley Davidson FLTRK Road Glide Limited
2022 Harley Davidson FLTRKSE CVO Road Glide Limited
2022 Harley Davidson FLTRX Road Glide Custom
2022 Harley Davidson FLTRXS Road Glide Special
2022 Harley Davidson FLTRXSE CVO Road Glide
2022 Harley Davidson FLTRXST Road Glide ST