| Description | Date | Identifier | |
| Trend of increasing tyre sizes in the USA for the 40/50 HP model, and the potential for testing. | 12th Dec 1922 | Box 53 \ 2 Scan007 | |
| Letter from Dunlop Rubber Co. Ltd. discussing developments in larger section tyres for 20-inch wheels. | 28th Nov 1922 | Box 53 \ 2 Scan008 | |
| Outlining the weight increase effects of a new inner tube and discussing the trade-off between added weight and potential advantages. | 3rd Feb 1923 | Box 53 \ 2 Scan009 | |
| Confidential memo regarding Dunlop's experiments with low pressure, big section, pneumatic tyres and attaching results from tests on a Cadillac car. | 28th Apr 1923 | Box 53 \ 2 Scan010 | |
| Extract from a report detailing a road test and feedback on low-pressure tyres. | 28th Apr 1923 | Box 53 \ 2 Scan011 | |
| Extract detailing tyre tests and the development of a new single-piece aluminium alloy wheel. | 9th May 1923 | Box 53 \ 2 Scan012 | |
| Confirming a rescheduled meeting with the Dunlop Company to discuss large section Low Pressure Tyres. | 9th May 1923 | Box 53 \ 2 Scan013 | |
| Visit from a Dunlop Rubber Co. engineer demonstrating new low-pressure tyres. | 16th May 1923 | Box 53 \ 2 Scan014 | |
| The testing and evaluation of new Dunlop tyres for the 20 HP and 40/50 HP models. | 17th May 1923 | Box 53 \ 2 Scan015 | |
| Front and rear axle weights of 20 HP and 40/50 HP average touring cars, intended for Dunlop. | 17th May 1923 | Box 53 \ 2 Scan016 | |
| Cover note for correspondence with the Dunlop Company regarding low pressure tyres. | 14th Jul 1923 | Box 53 \ 2 Scan017 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the supply and testing of low-pressure tyres. | 11th Jul 1923 | Box 53 \ 2 Scan018 | |
| Letter to Dunlop Rubber Co. Ltd. concerning the progress of low pressure tyres. | 14th Jul 1923 | Box 53 \ 2 Scan019 | |
| To arrange a meeting with Mr. Macbeth to discuss larger super-cushioned tyres received from Dunlop's. | 17th Aug 1923 | Box 53 \ 2 Scan020 | |
| The initial testing of Dunlop super-cushion tyres. | 17th Aug 1923 | Box 53 \ 2 Scan021 | |
| The performance of special low-pressure tyres developed by the Dunlop Rubber Co. | 16th May 1923 | Box 53 \ 2 Scan022 | |
| The performance and characteristics of a new tyre design, including comparative tests. | 16th Sep 1923 | Box 53 \ 2 Scan023 | |
| Inquiring about the progress of special tyres and rims from Dunlop for the 40/50 and Goshawk models. | 7th Jul 1923 | Box 53 \ 2 Scan024 | |
| Weight specifications for a 36' x 6' Special Dunlop tyre and wheel assembly. | 13th Aug 1923 | Box 53 \ 2 Scan025 | |
| Super-cushion Tyres and an accompanying pamphlet. | 14th Aug 1923 | Box 53 \ 2 Scan026 | |
| Letter reporting on the performance, mileage and specifications of Super-cushion tires. | 4th Aug 1923 | Box 53 \ 2 Scan027 | |
| Advantages and performance characteristics of 'Super-cushion' tires. | 4th Aug 1923 | Box 53 \ 2 Scan028 | |
| The experimental development of new tire sizes by Dunlop and other English manufacturers. | 15th Aug 1923 | Box 53 \ 2 Scan029 | |
| Proposal to adopt larger, softer, low-pressure tyres to improve ride quality. | 15th Aug 1923 | Box 53 \ 2 Scan030 | |
| Note expressing a preference for a 6-inch measurement over a 7-inch one for being safer. | 17th Aug 1923 | Box 53 \ 2 Scan031 | |
| Meeting with Mr. Macbeth of Dunlop's about super-cushioned tyres. | 17th Aug 1923 | Box 53 \ 2 Scan032 | |
| Comparison of the moment of inertia for a 40/50 wheel fitted with 33 X 5 cord and balloon tyres. | 20th Aug 1923 | Box 53 \ 2 Scan033 | |
| Super Cushion Tyres, attaching a letter from Springfield on the same topic. | 27th Aug 1923 | Box 53 \ 2 Scan034 | |
| Letter forwarding an article by J. E. Hale of Firestone regarding Super Cushion Tires. | 15th Aug 1923 | Box 53 \ 2 Scan035 | |
| Letter from Dunlop discussing the experimental results of low-pressure tyres compared to normal tyres. | 21th Aug 1923 | Box 53 \ 2 Scan036 | |
| Letter from Dunlop Rubber Co Ltd. regarding big section tyres and offering a demonstration of low-pressure tyres to Mr. Royce. | 21th Aug 1923 | Box 53 \ 2 Scan037 | |
| Paper discussing the limitations of pneumatic motor tyre design and the subsequent development of a more comfortable, large section tyre. | 21th Aug 1923 | Box 53 \ 2 Scan038 | |
| Technical document discussing tyre design, including section increases, inflation pressures, and construction materials. | 21th Aug 1923 | Box 53 \ 2 Scan039 | |
| The merits of tyre contact area, comparing low-pressure and normal tyres. | 21th Aug 1923 | Box 53 \ 2 Scan040 | |
| Comparison of the puncture resistance and cushioning effects of low-pressure versus normal tyres. | 21th Aug 1923 | Box 53 \ 2 Scan041 | |
| The benefits of Low Pressure Tyres, focusing on ease of handling and safety features. | 21th Aug 1923 | Box 53 \ 2 Scan042 | |
| Effects of low-pressure tyres on vehicle performance characteristics. | 21th Aug 1923 | Box 53 \ 2 Scan043 | |
| The effects and benefits of using Low Pressure Tyres, including weight reduction, appearance, and standardization. | 21th Aug 1923 | Box 53 \ 2 Scan044 | |
| Proposing the adoption of Low Pressure Tyres and a simplified range of substitutes for various car models. | 21th Aug 1923 | Box 53 \ 2 Scan045 | |
| Proposed new range of low-pressure tyres, their specifications, and fitting considerations for older chassis. | 30th Aug 1923 | Box 53 \ 2 Scan046 | |
| Urgent fitting of special wheels and 'Balloon Tyres' to Mr. Royce's car, noting a delay from Coventry. | 30th Aug 1923 | Box 53 \ 2 Scan047 | |
| Letter to Dunlop Rubber Co. Ltd. regarding the testing and supply of Balloon Tyres for experimental cars. | 30th Aug 1923 | Box 53 \ 2 Scan048 | |
| Letter from Dunlop Rubber Co Ltd regarding tyres and wheels for a car for Mr. Royce. | 31th Aug 1923 | Box 53 \ 2 Scan049 | |
| Confirming the dispatch of wheels and balloon tyres from Dunlop Rubber Co. Ltd for the 20 HP chassis. | 31th Aug 1923 | Box 53 \ 2 Scan050 | |
| Letter from Dunlop regarding tyre testing and a request to borrow a set of wheels. | 3rd Sep 1923 | Box 53 \ 2 Scan051 | |
| Graph comparing the tractive resistance of standard tyres versus balloon tyres at various speeds. | 31th May 1923 | Box 53 \ 2 Scan052 | |
| Letter to Dunlop Rubber Co. Ltd. regarding the arrangement to send wheels and tyres. | 5th Sep 1923 | Box 53 \ 2 Scan053 | |
| Returning wire wheels with large tyres to Dunlop Rubber Co. after testing. | 8th Sep 1923 | Box 53 \ 2 Scan054 | |
| Experimenting with larger section Dunlop tyres for 40/50 HP and 20 HP cars. | 12th Sep 1923 | Box 53 \ 2 Scan055 | |
| Comparison of performance between balloon and cord normal tyres, detailing acceleration, speed, and hill climb tests. | 13th Sep 1923 | Box 53 \ 2 Scan056 | |
| The performance tests of balloon tyres compared to normal cord tyres. | 13th Sep 1923 | Box 53 \ 2 Scan057 | |
| Letter to Dunlop Rubber Co. Ltd. regarding the performance of Balloon Tyres on a 20 HP car and an inquiry about 40/50 HP wheels. | 28th Sep 1923 | Box 53 \ 2 Scan058 | |
| Letter from Dunlop confirming the dispatch of six 33 x 5 S/S tyres with tubes and flaps for testing. | 19th Sep 1923 | Box 53 \ 2 Scan059 | |
| Travel arrangements for a Dunlop representative and reporting a successful tyre test on Snowdon. | 26th Oct 1923 | Box 53 \ 2 Scan060 | |
| Letter to the Dunlop Rubber Co. detailing issues of noise and vibration experienced with their Balloon tyres. | 1st Oct 1923 | Box 53 \ 2 Scan061 | |
| Testing of balloon tyres, focusing on vibration and noise issues on different car models. | 1st Oct 1923 | Box 53 \ 2 Scan062 | |
| Letter to M. Olley in America regarding Balloon Tyres, a visit from Dunlop, and tyre testing results. | 1st Oct 1923 | Box 53 \ 2 Scan063 | |
| Letter from Dunlop discussing the performance and development of low pressure tyres. | 1st Oct 1923 | Box 53 \ 2 Scan064 | |
| Letter from Dunlop Rubber Co Ltd acknowledging receipt of a letter and forwarding it on. | 2nd Oct 1923 | Box 53 \ 2 Scan065 | |
| Letter to Dunlop Rubber Co. Ltd. requesting dimensions for 33 X 8' and 33 X 7' tyres. | 2nd Oct 1923 | Box 53 \ 2 Scan066 | |
| Letter from Dunlop regarding the effective radius of 36 x 8 and 34 x 7 Low Pressure Tyres. | 4th Oct 1923 | Box 53 \ 2 Scan067 | |
| Cross-section drawing of a 34x7 Traction Tread Low Pressure Tyre. | 23th Oct 1923 | Box 53 \ 2 Scan068 | |
| Blueprint showing the overall dimensions and cross-section of a 36x8 Low Pressure Traction Tread tyre. | 3rd Oct 1928 | Box 53 \ 2 Scan069 | |
| Letter from Dunlop requesting the testing of six 33 x 5 S/S Cord Covers and for their mileage to be recorded. | 20th Oct 1923 | Box 53 \ 2 Scan070 | |
| Letter to The Dunlop Rubber Co. Ltd. regarding the return of a set of 40/50 HP wheels and low-pressure tyres, and enquiring about a second set. | 23th Oct 1923 | Box 53 \ 2 Scan071 | |
| Letter from Dunlop regarding the return of loaned 40/50 HP wheels and tyres, and the dispatch of a second set. | 25th Oct 1923 | Box 53 \ 2 Scan072 | |
| Set of Dunlop Balloon Tyres being sent to Stores for collection by Messrs. Dunlop. | 20th Nov 1923 | Box 53 \ 2 Scan073 | |
| Points to consider regarding the fitting of balloon tyres to a Croalls 20HP demonstration chassis. | 7th Dec 1923 | Box 53 \ 2 Scan074 | |
| Letter from Dunlop Rubber Co Ltd regarding a delay in the delivery of new pattern tyres. | 10th Dec 1923 | Box 53 \ 2 Scan075 | |
| Instructing the Stores to despatch a loaned experimental inner tube to Messrs. Dunlop. | 10th Dec 1923 | Box 53 \ 2 Scan076 | |
| Letter to Dunlop Rubber Co. returning a faulty inner tube and providing feedback on their low-pressure tyres. | 10th Dec 1923 | Box 53 \ 2 Scan077 | |
| Letter concerning the return of a borrowed set of 40/50 wheels and tyres and mileage records. | 12th Dec 1923 | Box 53 \ 2 Scan078 | |
| Letter from Dunlop regarding low pressure tyres, side slip issues, and replacement wheel sets. | 12th Dec 1923 | Box 53 \ 2 Scan079 | |
| Failed tube being replaced and sent to Messrs. Dunlop. | 1st Jan 1924 | Box 53 \ 2 Scan080 | |
| Letter to Dunlop regarding a tyre inner tube failure on a 20 HP car and requesting a replacement. | 11th Jan 1924 | Box 53 \ 2 Scan081 | |
| Confirming a visit from representatives of the Dunlop Company to discuss low-pressure tyres. | 16th Jan 1924 | Box 53 \ 2 Scan082 | |
| Draft letter to the Dunlop Company concerning arrangements for low-pressure tyres and the return of wheels. | 21th Jan 1924 | Box 53 \ 2 Scan083 | |
| Letter to Dunlop Rubber Co. Ltd. confirming arrangements for rebuilding wheels to suit different sized low-pressure tyres. | 21th Jan 1924 | Box 53 \ 2 Scan084 | |
| The performance of Balloon Tyres after mileage testing, including conclusions on skidding and braking. | 21th Jan 1924 | Box 53 \ 2 Scan085 | |
| The performance and characteristics of Balloon tyres, page 2. | 1st Jan 1924 | Box 53 \ 2 Scan086 | |
| The effects of standard and balloon tyres on vehicle noise, vibration, and ride quality. | 21th Jan 1924 | Box 53 \ 2 Scan087 | |
| The dispatch of ten Dunlop wheels of two different sizes to the Stores. | 23th Jan 1924 | Box 53 \ 2 Scan088 | |
| Report on Balloon tyres and an agreement with Dunlop to supply smaller sets for 20 HP and 40/50 HP cars. | 23th Jan 1924 | Box 53 \ 2 Scan089 | |
| Letter to the Dunlop Rubber Company regarding the supply of low-pressure tyres and the re-building of wheels. | 30th Jan 1924 | Box 53 \ 2 Scan090 | |
| Covering memo attaching a copy of a report regarding an experiment on Balloon Tires. | 25th Feb 1924 | Box 53 \ 2 Scan091 | |
| Letter discussing the performance and comparison of different experimental balloon tires. | 11th Jan 1924 | Box 53 \ 2 Scan092 | |
| Comparing the performance of American and English tires under different conditions. | 11th Feb 1924 | Box 53 \ 2 Scan093 | |
| The performance and disadvantages of balloon tires, including mileage and handling characteristics. | 11th Feb 1924 | Box 53 \ 2 Scan094 | |
| Comparison chart of dimensions for standard and balloon tires. | 28th Feb 1924 | Box 53 \ 2 Scan095 | |
| Article from 'Automotive Industries' about the promising automotive market in the Philippine Islands for 1924. | 28th Feb 1924 | Box 53 \ 2 Scan096 | |
| From CJ to Hs regarding the adoption and experimentation of balloon tyres. | 1st Mar 1924 | Box 53 \ 2 Scan097 | |
| Magazine advertisement for the Fiat 10/15 HP and other available models. | 8th Mar 1924 | Box 53 \ 2 Scan098 | |
| Article from 'Country Life' magazine discussing dangerous driving laws and the pros and cons of 'Balloon' tyres. | 8th Mar 1924 | Box 53 \ 2 Scan099 | |
| Article discussing the pros, cons, and standardisation of balloon tyres, alongside advertisements for Daimler and Overland cars. | 8th Mar 1924 | Box 53 \ 2 Scan100 | |
| Advertisement for the Dodge Brothers Saloon car from Country Life magazine. | 8th Mar 1924 | Box 53 \ 2 Scan101 | |
| Letter from F.H. Royce discussing balloon tyres, shackles, and collaboration with the American Co. | 11th Mar 1924 | Box 53 \ 2 Scan102 | |
| The advantages and disadvantages of balloon tyres. | 14th Mar 1924 | Box 53 \ 2 Scan103 | |
| The lack of standardization for tyre and rim sizes among manufacturers and its impact on recommendations. | 19th May 1924 | Box 53 \ 2 Scan104 | |
| Requesting additional Dunlop Balloon tyres and wheels for a 10,000-mile car test in France. | 19th May 1924 | Box 53 \ 2 Scan105 | |
| Arranging the supply of Dunlop balloon tyres and wheels for 40/50 HP cars for tests in France. | 30th May 1924 | Box 53 \ 2 Scan106 | |
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