| Description | Date | Identifier | |
| The bumper testing of Dunlop wire wheels with Goodyear rims. | 4th Jan 1921 | Box 159 \ 1 scan0065 | |
| Defects in Dunlop wire wheels with Goodyear rims and the impact on production and chassis supply to the USA. | 6th Jan 1921 | Box 159 \ 1 scan0066 | |
| The use of Dunlop wire wheels with Goodyear rims and removable flanges for straight-sided tyres. | 7th Jan 1921 | Box 159 \ 1 scan0067 | |
| Communication regarding the decision to not use American-made Goodyear rims following a failure. | 11th Jan 1921 | Box 159 \ 1 scan0068 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the failure of Goodyear Rims and planned investigations. | 10th Jan 1921 | Box 159 \ 1 scan0069 | |
| Letter from Dunlop Rubber Co. Ltd. concerning an issue with rims and a related accident. | 27th Jan 1921 | Box 159 \ 1 scan0070 | |
| Change in policy for wire wheels and tyres supplied for the American market. | 27th Jan 1921 | Box 159 \ 1 scan0071 | |
| Chassis with Goodyear rims and the non-standardisation of Dunlop wire wheels for straight-sided tyres. | 8th Feb 1921 | Box 159 \ 1 scan0072 | |
| Hold-up of various 'R' series material sections for potential improvements. | 11th Feb 1921 | Box 159 \ 1 scan0073 | |
| Quality concerns with Goodyear detachable rims for straight-sided tyres. | 8th Mar 1921 | Box 159 \ 1 scan0074 | |
| Gap and weight of detachable rims for straight-sided Goodyear tyres. | 10th Mar 1921 | Box 159 \ 1 scan0075 | |
| Acceptable gaps for wheel flanges and communications with Dunlop and Goodyear. | 5th Apr 1921 | Box 159 \ 1 scan0076 | |
| Expressing dissatisfaction with the design of Dunlop wire wheels and suggesting alternatives from Rudge-Whitworth, Riley, and Sankey. | 27th Apr 1921 | Box 159 \ 1 scan0077 | |
| Feasibility and potential improvements for Dunlop wire wheels for the Goshawk 11. | 9th May 1921 | Box 159 \ 1 scan0078 | |
| Standardisation sheet for Dunlop wheels fitted with Goodyear demountable rims. | 21th Jun 1921 | Box 159 \ 1 scan0079 | |
| Standardisation sheet for Dunlop wheels fitted with Goodyear demountable rims. | 24th Jun 1921 | Box 159 \ 1 scan0080 | |
| Standardisation sheet for Dunlop wheels fitted with Goodyear demountable rims. | 25th Jun 1921 | Box 159 \ 1 scan0081 | |
| Resolving an issue with faulty Dunlop wheels and Goodyear demountable rims. | 27th Jun 1921 | Box 159 \ 1 scan0082 | |
| Query regarding the standardization, compatibility, and testing of Dunlop wheels fitted with Goodyear demountable rims. | 25th Jun 1921 | Box 159 \ 1 scan0083 | |
| Concluding page of a memorandum urging full consideration before a decision is made. | 6th Jul 1921 | Box 159 \ 1 scan0084 | |
| Options and standardization of Dunlop wheels fitted with demountable rims. | 6th Jul 1921 | Box 159 \ 1 scan0085 | |
| Change to demountable rims and straight-sided tyres as an industry-wide improvement. | 6th Jul 1921 | Box 159 \ 1 scan0086 | |
| Seeking information and test results for demountable rims and straight-sided tyres. | 19th Jul 1921 | Box 159 \ 1 scan0087 | |
| On demountable rims and straight-sided tyres, comparing American versions with proposed Dunlop-manufactured ones. | 20th Jul 1921 | Box 159 \ 1 scan0088 | |
| Standardisation of straight-sided tyres and Dunlop wheels with Goodyear rims. | 28th Jul 1921 | Box 159 \ 1 scan0089 | |
| Standardisation of chassis parts to use Dunlop wheels with Goodyear demountable rims. | 20th Jun 1921 | Box 159 \ 1 scan0090 | |
| Visit from Dunlop Rubber Co. Ltd. to discuss wire wheel orders. | 15th Aug 1921 | Box 159 \ 1 scan0091 | |
| The production status of Dunlop covering discs for E.5 wire wheels. | 15th Aug 1921 | Box 159 \ 1 scan0092 | |
| Feedback on wire wheels for straight side tyres with the Dunlop Rubber Co. Ltd. | 22th Dec 1922 | Box 159 \ 1 scan0093 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the design of detachable flanges for wire wheels. | 20th Dec 1922 | Box 159 \ 1 scan0094 | |
| Mr. Royce's critical feedback and requested modifications for a 7-Goshawk Maythorn Saloon car. | 29th Nov 1922 | Box 159 \ 1 scan0095 | |
| Continued complaint about a windscreen clamp design, referencing the Goshawk-11 and questioning the objection to the 'Auster' type. | 12th Mar 1923 | Box 159 \ 1 scan0096 | |
| Testing of a Dunlop wheel on an experimental car. | 12th Mar 1923 | Box 159 \ 1 scan0097 | |
| Comparing the Rudge Whitworth and Dunlop wire wheels, outlining the technical preference for the Dunlop design. | 5th May 1923 | Box 159 \ 1 scan0098 | |
| Letter from Dunlop regarding a proposed alteration in spoking for straight back spoke wire wheels. | 4th Jun 1923 | Box 159 \ 1 scan0099 | |
| Standardisation of chassis parts for Dunlop wire wheels with straight spokes on the inside to reduce spoke failures. | 2nd Jul 1923 | Box 159 \ 1 scan0100 | |
| Brief memo regarding wire wheel spokes, forwarding a document received from Springfield. | 1st Aug 1923 | Box 159 \ 1 scan0101 | |
| Attaching a copy of a document from Springfield regarding wire wheel spokes. | 10th Aug 1923 | Box 159 \ 1 scan0102 | |
| Letter concerning the breakage of wire wheel spokes, comparing American-made with Dunlop spokes, and detailing material tests. | 28th Jul 1925 | Box 159 \ 1 scan0103 | |
| Adoption of a new-type countersunk head spoke over the Dunlop button-head spoke for wheels. | 21th Aug 1923 | Box 159 \ 1 scan0104 | |
| Breakdown of the weight of a standard Dunlop wheel and tyre. | 21th Aug 1923 | Box 159 \ 1 scan0105 | |
| Recommendation to apply an anti-rust treatment, such as sheradizing, to wire wheels and spokes before enamelling. | 1st Oct 1923 | Box 159 \ 1 scan0106 | |
| Outlining reasons against sheradising Dunlop wire wheels before enamelling. | 4th Oct 1923 | Box 159 \ 1 scan0107 | |
| Letter to the Dunlop Rubber Co. regarding the exchange and testing of 40/50 HP wheels and tyres. | 23th Oct 1923 | Box 159 \ 1 scan0108 | |
| The difficulty of removing Dunlop wheels on a 10,000 Mile Trial Car, Chassis No.12-EM, due to a jammed withdrawal ring. | 13th Nov 1923 | Box 159 \ 1 scan0109 | |
| Trouble with locking rings on Dunlop wheels. | 15th Nov 1923 | Box 159 \ 1 scan0110 | |
| Broken spoke on a latest type Dunlop wire wheel after 6,892 miles. | 7th Dec 1928 | Box 159 \ 1 scan0111 | |
| Supply and ordering of Rudge-Whitworth and Dunlop wheels for 20 HP and 40/50 HP chassis. | 9th Apr 1924 | Box 159 \ 1 scan0112 | |
| Selection and ordering of Rudge-Whitworth versus Dunlop wheels for 40/50 HP and 20 HP models. | 10th Apr 1924 | Box 159 \ 1 scan0113 | |
| Blueprints for special Rudge Whitworth wheels, noting Dunlop as an alternative supplier. | 29th Apr 1924 | Box 159 \ 1 scan0114 | |
| Failures with Dunlop wheels and tyres on experimental cars in France. | 12th May 1924 | Box 159 \ 1 scan0115 | |
| Continued page of a document regarding tyre covers, allowances, and the supply of new tyres. | 13th May 1924 | Box 159 \ 1 scan0116 | |
| Investigations into Dunlop wheel failures and potential remedies. | 13th May 1924 | Box 159 \ 1 scan0117 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the convex surface of outer spokes on an experimental set of wheels and balloon tyres. | 12th May 1924 | Box 159 \ 1 scan0118 | |
| Proposal for a 10,000-mile test of Dunlop Balloon Tyres on a 40/50 HP car in France, detailing the requirement for spare wheels and tyres. | 19th May 1924 | Box 159 \ 1 scan0119 | |
| Dispatch of 40/50 HP wheels fitted with 7' Rims to the Dunlop Company. | 3rd Jun 1924 | Box 159 \ 1 scan0120 | |
| Replacement order to The Dunlop Rubber Company to rebuild five 40/50 HP wheels. | 3rd Jun 1922 | Box 159 \ 1 scan0121 | |
| Letter to Dunlop Rubber Co. concerning issues with detachable wheel flanges during high-speed tests. | 1st Jul 1924 | Box 159 \ 1 scan0122 | |
| The second page of a letter from the Technical Production Engineer regarding fitting wheels and tyres to racing cars. | 1st Jul 1924 | Box 159 \ 1 scan0123 | |
| Failures of Dunlop demountable rims during testing and proposing a locking device. | 27th Jun 1924 | Box 159 \ 1 scan0124 | |
| Arranging the loan of a second-hand Dunlop 40/50 HP wheel to The North British Rubber Co. Ltd. | 1st Jul 1924 | Box 159 \ 1 scan0125 | |
| Comparing the performance of Rudge Whitworth wheels against Dunlop wheels after a 17,000-mile test on a 20 HP car. | 17th Jul 1924 | Box 159 \ 1 scan0126 | |
| Return of a Dunlop wheel from Rapson Tyre & Jack Co. Ltd. | 22th Oct 1924 | Box 159 \ 1 scan0127 | |
| Letter from Dunlop Rubber Co. enquiring about a specially plated wheel loaned to the Experimental Department a year prior. | 18th Nov 1924 | Box 159 \ 1 scan0128 | |
| Returning a loaned Dunlop wheel to the supplier in Birmingham. | 19th Nov 1924 | Box 159 \ 1 scan0129 | |
| Follow-up letter from Dunlop regarding a specially plated wheel loaned out twelve months prior. | 19th Dec 1924 | Box 159 \ 1 scan0130 | |
| Letter from Dunlop Rubber Co. Ltd. inquiring about a loaned, specially plated wheel. | 18th Nov 1924 | Box 159 \ 1 scan0131 | |
| Letter to Messrs. Dunlop confirming the despatch of a wheel. | 22th Dec 1924 | Box 159 \ 1 scan0132 | |
| Letter from Dunlop Rim & Wheel Co. Ltd. requesting a letter reference for a memo to connect it with the relevant party. | 31th Dec 1924 | Box 159 \ 1 scan0133 | |
| Letter to Messrs. Dunlop providing references to previous correspondence concerning a wheel. | 1st Jan 1925 | Box 159 \ 1 scan0134 | |
| Letter from Dunlop Rim & Wheel Co. Ltd. concerning wheel correspondence and wheels from chassis 62-EM. | 7th Jan 1925 | Box 159 \ 1 scan0135 | |
| Continuation sheet of a letter from the Dunlop Rim & Wheel Company Ltd. to Messrs. Rolls Royce Ltd. | 8th Jan 1925 | Box 159 \ 1 scan0136 | |
| Letter to The Dunlop Rubber Co. regarding the location of a specially plated wheel that had been misplaced. | 8th Jan 1925 | Box 159 \ 1 scan0137 | |
| Letter to Dunlop regarding an enquiry about specially plated wheels and steel wheels. | 8th Jan 1925 | Box 159 \ 1 scan0138 | |
| Letter from Dunlop Rim & Wheel Co. Ltd. regarding a memo about a specially nickel plated wheel. | 14th Jan 1925 | Box 159 \ 1 scan0139 | |
| Letter to Dunlop Rubber Co. regarding technical specifications and a loan request for wheels for testing purposes. | 16th Sep 1925 | Box 159 \ 1 scan0140 | |
| Letter to The Cambridge Instrument Co. regarding an apparatus for the dynamic balancing of wheels. | 16th Sep 1925 | Box 159 \ 1 scan0141 | |
| Letter from Dunlop discussing wheel and tyre specifications, offset details, and supply terms. | 21th Sep 1925 | Box 159 \ 1 scan0142 | |
| The receipt of a 21 x 5 Dunlop wire wheel and tyre. | 22th Sep 1925 | Box 159 \ 1 scan0143 | |
| Letter to the Dunlop Rubber Co. regarding a request for a set of disc wheels. | 24th Sep 1925 | Box 159 \ 1 scan0144 | |
| Comparing the weight of a new Dunlop well-based wheel against the standard wheel. | 25th Sep 1925 | Box 159 \ 1 scan0145 | |
| Letter from Dunlop confirming an order for a set of 21 x 5.6 stud disc wheels on loan for experimental purposes. | 25th Sep 1925 | Box 159 \ 1 scan0146 | |
| Identification codes for various Dunlop detachable wheels and hubs. | 18th Aug 1926 | Box 159 \ 1 scan0147 | |
| Wheel balancing tests for 33 x 6.75 inch tyres, comparing different types of inner tubes. | 26th Nov 1926 | Box 159 \ 1 scan0148 | |
| Wheel balancing problems caused by the position of the joint in the inner tube. | 26th Nov 1926 | Box 159 \ 1 scan0149 | |
| List of moments of inertia for various wheel and tyre components related to high-speed wobbles. | 26th Nov 1926 | Box 159 \ 1 scan0150 | |
| Identification codes for various Dunlop detachable wheels and hubs. | 30th Mar 1927 | Box 159 \ 1 scan0151 | |
| List of specifications for detachable wire and artillery wheels for the 20 HP Chassis. | 30th Mar 1927 | Box 159 \ 1 scan0152 | |
| Selection of suitable wheels and tyres for the 20 HP chassis. | 25th Apr 1927 | Box 159 \ 1 scan0153 | |
| Query regarding an alteration to the rear tank for increased road clearance. | 25th Apr 1927 | Box 159 \ 1 scan0154 | |
| Letter from Dunlop Rim & Wheel Co. Ltd. confirming an order for a set of 6 wheels. | 6th May 1927 | Box 159 \ 1 scan0155 | |
| Letter to The Dunlop Rim & Wheel Co. Ltd. concerning an order for a set of wire wheels. | 6th May 1927 | Box 159 \ 1 scan0156 | |
| Internal request to order a set of wire wheels from the Dunlop Rim & Wheel Co. | 6th May 1927 | Box 159 \ 1 scan0157 | |
| Ground clearance measurements for a 20 HP car with smaller wheels. | 6th May 1927 | Box 159 \ 1 scan0158 | |
| Effect of different tyre and wheel sizes on a 20 HP car. | 6th May 1927 | Box 159 \ 1 scan0159 | |
| List of weights for different tyre and wheel combinations. | 1st Oct 1927 | Box 159 \ 1 scan0160 | |
| Proposing narrower wire wheels for the Phantom model by modifying artillery wheel hubs to reduce weight. | 1st Oct 1927 | Box 159 \ 1 scan0161 | |
| Comparing the tyre removal mechanisms of Michelin and Dunlop wheels, proposing a new two-depression rim design. | 31th Oct 1927 | Box 159 \ 1 scan0162 | |
| Letter regarding modified wire wheels for the Phantom chassis, instructing an urgent order be placed with the Dunlop Co. | 10th Nov 1927 | Box 159 \ 1 scan0163 | |
| Parts list for Phantom chassis narrower wire wheels, detailing special and common components. | 10th Nov 1927 | Box 159 \ 1 scan0164 | |
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