Shop Speedwell mudguards and motorcycle fenders for classic Triumph and BSA motorcycles at The Bonneville Shop. Our selection includes model-specific front and rear guards, selected matching sets, and universal profiles in mild steel and alloy. Stainless-steel and chrome options are available in the listed applications.
Speedwell’s UK manufacturing heritage dates to 1897. The official Speedwell Mudguards website describes continued production for the British motorcycle industry using original tooling and machines. Choose by original part number, model and year, material, edge style and mounting requirements. For universal guards, compare the listed dimensions rather than assuming direct fitment. Read our Speedwell fender measurement guide, or explore our broader Triumph fender collection and BSA mudguard collection.
Table of Contents
Choosing the Correct Speedwell Mudguard
The right mudguard combines the correct shape, dimensions and mounting arrangement for your motorcycle. A familiar appearance or similar part number is a starting point—not proof that two guards are interchangeable.
Our Speedwell selection includes specific Triumph and BSA replacements alongside universal mudguard blanks. Listings distinguish front and rear applications, materials, edge treatments, drilled and undrilled versions, and selected US- and UK-specification designs.
Before ordering, compare:
- Motorcycle model and production year.
- Original part number and listed replacement references.
- Front or rear position.
- Material and finish.
- Edge style and profile.
- Drilling, mounting tabs and stay requirements.
- Dimensions and clearance requirements where supplied.
Use the appropriate Triumph parts book or BSA parts book to identify the original component. If the forks, wheels, tires or frame have been changed, compare the equipment actually fitted rather than relying on the motorcycle’s year alone.
Speedwell’s British Manufacturing Heritage
Speedwell Gearcase was founded in 1897 and became a public company in 1937. Its history included factories in Birmingham, the Black Country and Coventry, producing bicycles, gearboxes, chain guards and mudguards.
The manufacturer states that Chris and Val Williams of Autocycle Engineering took ownership in 1978, with Andrew Gregory of Tri-Cor subsequently taking the reins. Speedwell describes its current work as supplying the British motorcycle industry with OE products made using original tooling and machines.
That history explains the brand’s connection to classic motorcycle restoration. It does not mean every guard is original-period stock, predrilled or ready to install without fitting work.
Mild Steel, Stainless Steel, Alloy and Chrome
The current collection offers several distinct material and finish choices. Read the individual description carefully: polished stainless steel and chrome-plated steel can look similar, but they are not the same product specification. Your Speedwell technical article explicitly illustrates that distinction.
| Listed option | What to confirm before purchasing |
| Bare or unpainted mild steel | Required finishing, listed profile and drilling status. |
| Stainless steel | Application, edge treatment, finish and whether holes are provided. |
| Alloy | Profile, dimensions, edge style and listed model application. |
| Chrome | Base product specification, mounting arrangement and application. |
| Front-and-rear set | Exactly which guards are included and whether their configuration suits the motorcycle. |
These options appear in your current assortment; no one finish is offered for every application.
For associated bodywork and attachment components, browse Triumph frame, body and trim, BSA frame, body and trim, Triumph hardware and BSA hardware.
Rolled, Beaded, Plain and Razor-Edge Designs
Edge treatment is an important visual and construction detail. Your Speedwell listings identify rolled-edge, beaded-edge, plain-edge and razor-edge guards, together with pressed-nose designs in selected applications.
Choose the version listed for the restoration or custom project rather than treating these descriptions as interchangeable. Your Speedwell technical guide illustrates formed channels, edge details and the difference between a correctly shaped guard and one modified by cutting away material.
Speedwell Mudguards for Classic Triumph Motorcycles
The current Triumph assortment includes selected T100, T120/TR6, T140/TR7 and other listed applications. It spans different decades and configurations, including pre-oil-in-frame, oil-in-frame, US-specification and UK-specification designs.
For example, the collection distinguishes 1973–1975 T140/TR7 rear guards from later rear-guard applications, and it includes front guards described by five-hole and six-hole configurations. Those distinctions make the individual product description more useful than a general “Triumph fender” label.
Use these supporting collections when planning the complete installation:
- Classic Triumph parts.
- Triumph fenders and mudguards.
- Triumph forks and suspension parts.
- Triumph wheels and related parts.
- Triumph tires.
- Triumph workshop manuals.
- Triumph parts books.
Speedwell Mudguards for BSA Motorcycles
The BSA selection includes A50/A65 front and rear chrome guards, a matching pre-oil-in-frame set, selected oil-in-frame applications, and B50 rear guards in bare mild steel and stainless steel. A front stainless guard is also listed for Triumph TR5T/BSA B50MX applications.
Do not assume that a guard listed for one BSA family fits another. Compare the part number, model, year and mounting arrangement.
Related collections include:
- BSA motorcycle parts.
- BSA fenders and mudguards.
- BSA forks and suspension parts.
- BSA wheels and related parts.
- BSA tires.
- BSA workshop manuals.
- BSA parts books.
Universal Speedwell Mudguards and Profile Selection
Universal mudguards are dimensional starting points for a project, not guaranteed bolt-on replacements. Your assortment includes MC1, MC2, MC3 and other listed profiles with different radius references, lengths and materials. Many titles distinguish 36-inch and 48-inch versions.
Do not confuse a mudguard’s listed radius with the nominal wheel or tire size. Compare the complete product dimensions and shape against the installation you intend to build.
Our mudguard measurement article explains the use of width, height, total length, radius and profile measurements. It also illustrates why channels and formed sections can matter as much as the overall outline.
For fabrication planning and related components, explore general motorcycle hardware and books and manuals.
Undrilled Guards and Mounting Requirements
Several Speedwell products in this collection are explicitly described as undrilled. Other listings identify hole counts, tabs or specific mounting configurations. Do not assume that every Speedwell guard arrives in the same state.
An undrilled guard requires the mounting locations to be established for the actual motorcycle. Check the product description and confirm the intended arrangement before drilling or finishing. Our Speedwell guide discusses the reason for supplying undrilled guards and illustrates model-specific shaping.
Looking for Norton Mudguards?
The current Speedwell grid shows Triumph- and BSA-specific products plus universal guards; it does not show a named Norton-specific Speedwell replacement.
For available Norton options and supporting components, visit:
- Norton fenders and mudguards.
- Norton frame, body and trim.
- Norton hardware.
- Norton wheels and tires.
- Norton parts books.
These are broader Norton collections, not a claim that the Speedwell range currently includes a direct-fit Norton guard.
Custom Orders and Help With Selection
Speedwell’s own website offers a custom-order feature for bespoke mudguards. This is a manufacturer service; it should not be assumed to be part of The Bonneville Shop’s standard stocked-product offering. See the official Speedwell website for manufacturer information.
For help choosing from our catalog, use our contact page, email orders@thebonnevilleshop.com, or call 720-570-7884. Include the model, year, original part number, desired material and details of any wheel, fork or frame modifications. Explore our supplier brands for other classic motorcycle replacement-parts manufacturers.
Speedwell Mudguards FAQs
What are Speedwell Mudguards?
Speedwell is a British mudguard manufacturer with a history dating to 1897. The company describes continued production for the British motorcycle industry using original tooling and machines. The Bonneville Shop stocks a selection of model-specific and universal Speedwell guards.
Is a mudguard the same as a motorcycle fender?
Yes. In this collection, “mudguard” and “fender” refer to the same type of component. The listings use both terms for front and rear motorcycle guards.
Which motorcycles are covered by the current Speedwell selection?
The current assortment contains specific Triumph and BSA applications together with universal mudguard profiles. Compatibility depends on the individual listing; the universal range is not a promise of direct fitment to every motorcycle.
Are Speedwell mudguards made in the UK?
Our Speedwell technical article identifies the range as UK-made and describes a guard made in England. Speedwell’s official website also describes its British manufacturing operation. Check the individual product description for the specification of the item you are ordering.
What materials and finishes are available?
The collection includes bare or unpainted mild steel, stainless steel, alloy and chrome products in selected applications. Availability varies by model and profile; not every design is offered in every material or finish.
Is polished stainless steel the same as chrome?
No. The descriptions distinguish stainless steel from chrome-finished products, and our Speedwell technical article specifically explains that a highly polished stainless guard can resemble chrome without being chrome-plated.
Do all Speedwell mudguards come predrilled?
No. Several listings explicitly identify undrilled guards, while others describe hole counts or mounting tabs. Read the individual description before assuming that mounting holes are included.
How do I measure for a universal Speedwell mudguard?
Compare the listed width, profile height, radius and overall length with the intended installation. Our mudguard measurement guide explains these measurements and illustrates the importance of formed channels and profile shape.
Does “universal” mean a mudguard will bolt straight onto my motorcycle?
No. Universal guards are offered in different profiles, radii, lengths and materials. Select by dimensions and the intended mounting arrangement rather than assuming model-specific fitment.
What is the difference between rolled, beaded, plain and razor-edge guards?
These terms identify different edge treatments in the product range. They should be treated as selection details rather than interchangeable descriptions. Compare the product photographs and listing with the original guard or the intended custom design.
Can I buy a matching front-and-rear Speedwell set?
Yes. The current grid includes selected sets, including a BSA A50/A65 pre-oil-in-frame chrome set and a stainless set listed for specified 1971–1973 Triumph/BSA applications. Check the contents and application of the particular set.
Are US-specification and UK-specification mudguards interchangeable?
Do not assume that they are. The assortment distinguishes selected US- and UK-specification designs, as well as different hole counts and production years. Match the specific part number and configuration using the product listing and the correct parts book.
Does The Bonneville Shop currently list Norton-specific Speedwell mudguards?
No named Norton-specific Speedwell guard appears in the current grid. Browse our broader Norton mudguard collection for available alternatives, or compare universal-guard dimensions for a custom project.
Can I order a bespoke Speedwell mudguard?
Speedwell advertises a custom-order feature on its official UK website. That manufacturer service is separate from our stocked catalog. For help selecting a listed product from The Bonneville Shop, use our contact page.