Reynolds Technology
British manufacturer of bicycle frame tubing.
Last updated August 31, 2026
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Overview
Reynolds Technology is a renowned British manufacturer of bicycle frame tubing, with its steel and titanium tubes widely used by high-end bicycle brands worldwide.
History
Reynolds Technology’s industrial lineage reaches back to 1841, when John Reynolds founded a business making nails. The dedicated tubing enterprise emerged in Birmingham in 1898 as the Patent Butted Tube Co. Ltd., spun out from the earlier Reynolds operation. Its key technical foundation was the development of butted tubing, in which the ends are made thicker than the middle. This enabled manufacturers to place material where stresses were greatest while reducing weight in less critical sections. A patent for the process was obtained in 1897, immediately before the dedicated company was established. The business adopted the name Reynolds Tube Co. Ltd. in 1923. In 1928 it was acquired by Tube Investments and became TI Reynolds 531 Ltd. The Tube Investments period connected Reynolds with large-scale British bicycle manufacturing and helped establish the 531 designation as a recognized quality mark among frame builders. Reynolds 531 had been introduced as a double-butted tubeset in 1934 and became particularly important in racing and high-quality touring bicycles. Raleigh of Nottingham was a major user, and Reynolds tubing was incorporated into many notable British frames. As bicycle design developed, Reynolds produced a broad succession of steel families and configurations. Early and mid-period products included plain-gauge and butted chromium-molybdenum ranges such as 453, 500, 501, and 525, while 531 was offered in versions for competition, touring, mountain bikes, cyclocross, and specialist applications. The company also created products for specific customers, including K2 and Optima tubesets developed for Raleigh. Later materials included seamless air-hardening steels such as 631 and 853, heat-treated 725, cold-worked stainless steel 921, precipitation-hardening stainless steel 931, and high-strength maraging stainless steel 953. The 953 programme, developed with Carpenter Specialty Alloys and reaching frame builders in 2005, used very thin walls to achieve a high strength-to-weight ratio. Reynolds’ corporate ownership changed in the late twentieth century. In 1996, Coyote Sports Inc., a privately held company from Boulder, Colorado, acquired TI Reynolds 531 Ltd. The acquisition resulted in the name Reynolds Cycle Technology Ltd. Coyote Sports subsequently entered Chapter 11 reorganization in the United States, after which a management buyout returned the Reynolds operation to its United Kingdom base. In 2006 the company became Reynolds Technology Ltd., a name intended to represent growing activity in non-cycle tubing markets. The company also broadened its materials expertise beyond bicycle steel. Its published product families have included aluminium alloys such as 6061 and 7005, titanium grades including 3Al-2.5V and 6Al-4V, the X-100 aluminium-lithium alloy, and magnesium tubing marketed as MZM Electron. A United States division, Reynolds Composites, was established to manufacture composite components. These activities reflected the broader engineering scope implied by the Reynolds Technology name, although bicycle tubing remained the company’s most recognizable field. The shift from steel to aluminium, titanium, and carbon composites reduced the former dominance of Reynolds steel among new high-end bicycle frames. Nevertheless, Reynolds retained an important heritage position with custom frame builders and riders who value repairable metal frames, carefully specified wall thicknesses, and the historical association of Reynolds tubing with competitive cycling. Some specialized products, including 953, have subsequently left the catalogue because of supply difficulties, while the brand’s identity continues to rest on material engineering and long-established bicycle-frame applications.
- 2012
Reynolds 931 introduced
[1]The company introduced 931 precipitation-hardening stainless-steel tubing as a complementary product to its premium stainless range.
- 2006
Company renamed Reynolds Technology
[1]The company changed its name to Reynolds Technology to reflect diversification beyond bicycle tubing.
- 2005
Reynolds 953 reaches the market
[1]The high-strength 953 maraging stainless-steel tubeset began reaching frame builders after collaborative development with Carpenter Specialty Alloys.
- 1996
Coyote Sports acquires the business
[1]Coyote Sports Inc. acquired TI Reynolds 531 Ltd., prompting the name Reynolds Cycle Technology Ltd.
- 1934
Reynolds 531 introduced
[1]The company introduced its double-butted 531 tubeset, which later became its best-known bicycle-frame material.
- 1928
Acquisition by Tube Investments
[1]Tube Investments acquired the company, which became TI Reynolds 531 Ltd.
- 1923
Business renamed Reynolds Tube Co.
[1]The Patent Butted Tube Co. adopted the Reynolds Tube Co. name.
- 1898
Patent Butted Tube Co. established
[1]The dedicated tubing predecessor of Reynolds Technology was separated from John Reynolds’s original company in Birmingham.
- 1897
Butted-tube process patented
[1]A process for producing tubes with thicker ends and thinner central sections was patented, creating the technical basis for lightweight structural tubing.
- 1841
John Reynolds begins an industrial enterprise
[1]John Reynolds established a nail-making company, an enterprise regarded as the industrial predecessor of the later tubing business.
Products and positioning
A heritage British engineering brand positioned around lightweight, high-strength tubing for bicycle frames and specialist tubular applications. Its strongest brand associations are technical steel development, butted construction, custom frame building, and racing heritage.
Manganese-molybdenum steel bicycle tubing · 1934
Reynolds 531
Reynolds 531 is the company’s historic signature steel tubeset. Introduced in 1934 as a double-butted product, it was designed to combine useful strength with reduced weight and became widely used in racing, touring, track, cyclocross, mountain, and utility frames. The 531 family included specialized variants such as Competition, Club Sport, Professional, Special Lightweight, Super Tourist, and ATB versions, each using different gauges or configurations for its intended application. It is now an established heritage product whose influence remains significant even though newer steels have replaced it in many contemporary frames.
Air-hardening heat-treated steel tubing
Reynolds 853
Reynolds 853 is a seamless, air-hardening, heat-treated steel developed for frames requiring higher strength than traditional 531. Its material characteristics allow frame designers to use relatively thin walls while retaining a substantial strength margin. The range included oversized versions and was intended for performance-oriented bicycle construction. It occupies the part of the catalogue that connects Reynolds’ classic steel heritage with more modern high-strength frame design.
Heat-treated chromium-molybdenum steel tubing
Reynolds 725
Reynolds 725 is a heat-treated AISI 4130 chromium-molybdenum steel tubeset positioned above conventional 525-type material in strength. It was offered for frames needing a balance of durability, weight, and cost, with an oversized version also available. The material is suitable for modern frame manufacturing and provides a higher-strength alternative to older plain-gauge or conventionally butted CrMo products.
Precipitation-hardening stainless-steel tubing · 2012
Reynolds 931
Introduced in 2012, Reynolds 931 is a precipitation-hardening stainless-steel tubing family. It was developed as a complementary option to 953, providing frame builders with a stainless material that could help reduce overall construction costs while retaining corrosion resistance and high mechanical performance. It can be combined with other Reynolds tubing families in selected frame designs.
Maraging stainless-steel bicycle tubing · 2005
Reynolds 953
Reynolds 953 was a premium maraging stainless-steel tubeset developed with Carpenter Specialty Alloys and introduced to frame builders from 2005. Its very high tensile strength enabled extremely thin tube walls, supporting lightweight frame construction without abandoning steel. The material represented one of Reynolds’ most technically ambitious bicycle products. It is no longer sold, with supply-chain problems reported as the reason for its discontinuation.
Cold-worked AISI 4130 chromium-molybdenum steel tubing
Reynolds 525
Reynolds 525 is a cold-worked chromium-molybdenum steel tubeset supplied in an eight-tube configuration. It was designed as a practical frame-building material with defined strength and density characteristics, and a triathlon variant adjusted the relative wall thicknesses of the stays. Reynolds 520 was produced under licence in Taiwan to comparable specifications and quality requirements for manufacturing closer to Asian production markets.
Non-ferrous bicycle-frame materials
Aluminium, titanium, and magnesium tubing
Beyond steel, Reynolds has listed aluminium alloys including 6061, 7005, and X-100 aluminium-lithium, titanium grades such as 3Al-2.5V and 6Al-4V, and magnesium tubing marketed as MZM Electron. These materials extended the company’s engineering offering into lighter or application-specific frame construction. The portfolio also included CP 2 titanium supplied to Raleigh during the 1990s.
Brand decisions
2006
Broaden the company identity beyond bicyclesStrategyBackground
Revenue from tubing applications outside the cycle sector was increasing, making the Cycle Technology name less representative of the business.
Action taken
The company changed its name to Reynolds Technology Ltd.
Aftermath
The new name emphasized a broader engineering and tubing remit while preserving the Reynolds brand’s bicycle heritage.
2005
Launch of Reynolds 953Product launchBackground
Reynolds sought to extend its premium steel offering through a very high-strength stainless alloy developed with Carpenter Specialty Alloys.
Action taken
The company introduced the 953 maraging stainless-steel tubeset to frame builders.
Aftermath
953 became a technically distinctive premium product but was later discontinued because of supply-chain problems.
1996
Coyote Sports acquisition and rebrandingM&ABackground
The former TI Reynolds 531 business was acquired by a privately held United States sporting-goods company.
Action taken
Coyote Sports Inc. acquired the operation and renamed it Reynolds Cycle Technology Ltd.
Aftermath
The company later returned to United Kingdom ownership through a management buyout after Coyote Sports entered Chapter 11 reorganization.
1928
Tube Investments acquisitionM&ABackground
The Reynolds tubing operation became part of the larger Tube Investments group.
Action taken
Tube Investments acquired the company and operated it as TI Reynolds 531 Ltd.
Aftermath
The acquisition linked Reynolds tubing with a major industrial group and British bicycle manufacturing supply chains.
1923
Rename the tubing business Reynolds Tube Co.StrategyBackground
The predecessor Patent Butted Tube Co. had developed into a distinct tubing operation requiring a name aligned with the Reynolds identity.
Action taken
The company changed its name to Reynolds Tube Co. Ltd.
Aftermath
The Reynolds name remained associated with the tubing business until its later acquisition by Tube Investments.
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