| Description | Date | Identifier | |
| The return of an unsatisfactory demonstration wheel and tyre to the Dunlop Rubber Co Ltd. | 24th Sep 1925 | Box 42 \ 1 Scan004 | |
| Agreement with the Dunlop Rubber Co. Ltd. for the supply of wheels and tyres at half-price for testing purposes. | 25th Sep 1925 | Box 42 \ 1 Scan005 | |
| Letter concerning the supply and delivery of Dunlop wheels and tyres for testing on 40/50 HP and 20 HP chassis. | 28th Sep 1925 | Box 42 \ 1 Scan006 | |
| Letter regarding the dispatch of 18 extra heavy covers and tubes for testing in France. | 23th Sep 1925 | Box 42 \ 1 Scan007 | |
| Use of lighter wheels with well base rims for a 10,000 miles test in France. | 30th Sep 1925 | Box 42 \ 1 Scan008 | |
| Delayed delivery of wire wheels fitted with new triple stud tyres. | 1st Oct 1925 | Box 42 \ 1 Scan009 | |
| Confidential letter from the Dunlop Co. concerning new season's price lists and the introduction of Wired-on Balloon tyres with Wellbase Rims. | 1st Oct 1925 | Box 42 \ 1 Scan010 | |
| Schedule from Dunlop Rubber Co. listing high pressure wired car tyres and their equivalents. | 30th Sep 1925 | Box 42 \ 1 Scan011 | |
| Request to obtain 5 Dunlop Disc Wheels for experimental purposes, including cost and return conditions. | 15th Oct 1925 | Box 42 \ 1 Scan012 | |
| Correspondence regarding the supply and testing of Dunlop wheels and tyres. | 22th Oct 1925 | Box 42 \ 1 Scan013 | |
| Disadvantages of using artillery wheels due to their weight and lack of strength. | 24th Oct 1925 | Box 42 \ 1 Scan014 | |
| Confirmation of Dunlop supplying detachable wire wheels and tyres for testing on a 40/50 HP chassis. | 26th Oct 1925 | Box 42 \ 1 Scan015 | |
| Letter to Dunlop regarding the standardisation of wheel rims and tyre compatibility. | 31th Oct 1925 | Box 42 \ 1 Scan016 | |
| Request for an opinion on the testing of 6 inch high-pressure Dunlop tyres for Lord Montagu. | 6th Dec 1925 | Box 42 \ 1 Scan017 | |
| Tyre options from Dunlop and Michelin, and arrangements for a car in France. | 12th Jun 1925 | Box 42 \ 1 Scan018 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the market dominance of 21-inch rims for low-pressure tyres. | 5th Nov 1925 | Box 42 \ 1 Scan019 | |
| Decision to use standard rims and tyres instead of a special Dunlop model due to availability issues for foreign markets. | 25th Nov 1925 | Box 42 \ 1 Scan020 | |
| Specification sheet detailing the weights of Dunlop standard and well-base wheels for the Goshawk model. | 19th Nov 1925 | Box 42 \ 1 Scan021 | |
| Specification sheet detailing the weights of Dunlop standard and wheelbase wheel assemblies for the 40/50 HP model. | 19th Nov 1925 | Box 42 \ 1 Scan022 | |
| Follow-up request for information regarding high-pressure tyres on well-base rims for Lord Montagu. | 30th Nov 1925 | Box 42 \ 1 Scan023 | |
| Internal query regarding tests, results, and customer advice for Dunlop Tyres and Well-base Rims. | 13th Jan 1926 | Box 42 \ 1 Scan024 | |
| Providing feedback on the testing and performance of well-base rims and tyres. | 14th Jan 1926 | Box 42 \ 1 Scan025 | |
| Replying to questions regarding the performance, testing, and future standardization of Dunlop tyres and well-base rims. | 14th Jan 1926 | Box 42 \ 1 Scan026 | |
| Letter to Dunlop Rubber Co. providing feedback on the performance of well base wheels and tyres, noting issues with tread noise. | 25th Jan 1926 | Box 42 \ 1 Scan027 | |
| The performance of Dunlop Cord well base wheels and tyres on an 8-EX car. | 25th Jan 1926 | Box 42 \ 1 Scan028 | |
| The condition of tyres and wheels, detailing punctures, mileage, wear, and a broken spoke. | 9th Feb 1926 | Box 42 \ 1 Scan029 | |
| Letter to The Dunlop Rubber Co. regarding the performance of well base tyres and rims, highlighting noise issues with a new tread. | 9th Feb 1926 | Box 42 \ 1 Scan030 | |
| The subject of high-speed steering wobbles in vehicles. | 9th Feb 1926 | Box 42 \ 1 Scan031 | |
| Continued report discussing vehicle 'shimmy' or 'wobble' issues, particularly concerning new well base tyres. | 1st Feb 1926 | Box 42 \ 1 Scan032 | |
| The unsatisfactory testing of well-base rims and tyres, advising against fitting them due to the risk of high-speed wobbles. | 1st Feb 1926 | Box 42 \ 1 Scan033 | |
| The effectiveness of hydraulic shock absorbers in eliminating high-speed steering wobbles. | 9th Feb 1926 | Box 42 \ 1 Scan034 | |
| Letter from Dunlop discussing the noise produced by their non-skidding tyres. | 16th Feb 1926 | Box 42 \ 1 Scan035 | |
| Cancellation of supplying well base rims and tyres due to front wheel wobble issues. | 17th Feb 1926 | Box 42 \ 1 Scan036 | |
| Standardisation of well base wheels and tyres, addressing issues like high-speed steering wobble and tyre noise. | 19th Feb 1926 | Box 42 \ 1 Scan037 | |
| Letter from Dunlop Rubber Co. regarding tyre noise and the non-skidding effect of different tread designs. | 16th Feb 1926 | Box 42 \ 1 Scan038 | |
| Comparative tests for high-speed steering wobbles using new well base rims and non-skid tyres. | 20th Feb 1926 | Box 42 \ 1 Scan039 | |
| Different tyre sizes and their impact on wheel wobble tests. | 2nd Feb 1926 | Box 42 \ 1 Scan040 | |
| From the Experimental Department regarding well-base tyres, rims, and hydraulic dampers in relation to wheel wobble on the Phantom. | 23th Feb 1926 | Box 42 \ 1 Scan041 | |
| Meeting with Dunlop to discuss issues with noisy tyres, front wheel wobble, and the price of wheels. | 23th Feb 1926 | Box 42 \ 1 Scan042 | |
| Blueprint comparing specifications of various Dunlop tyres and well base wheels. | 26th Feb 1926 | Box 42 \ 1 Scan043 | |
| Letter to The Dunlop Rubber Co. Ltd. regarding results of tyre observations and arranging a visit. | 5th Mar 1926 | Box 42 \ 1 Scan044 | |
| Standardisation of oil hydraulic shock dampers and the consequential arrangements with Dunlop Co. for wheel supply. | 15th Mar 1926 | Box 42 \ 1 Scan045 | |
| Visit to Dunlop to discuss their triple stud tread tyres, focusing on noise and wear characteristics. | 15th Mar 1926 | Box 42 \ 1 Scan046 | |
| Comparison of different tyre types, their construction, and performance characteristics for 40/50 HP and 20 HP models. | 15th Mar 1926 | Box 42 \ 1 Scan047 | |
| Tyre performance, comparing different types regarding comfort and high-speed wobble. | 8th Mar 1926 | Box 42 \ 1 Scan048 | |
| Proposing a 10,000-mile test for Dunlop tyres and arranging for their procurement in France. | 8th Mar 1926 | Box 42 \ 1 Scan049 | |
| Internal memorandum discussing tyre choices and proposing a switch to larger, lower-pressure tyres to improve ride comfort and compete with other manufacturers. | 24th Mar 1926 | Box 42 \ 1 Scan050 | |
| The adoption of wheels with well base rims and production scheduling with the Dunlop Company. | 19th Apr 1926 | Box 42 \ 1 Scan051 | |
| Letter discussing discrepancies in Dunlop's blueprints for well-base rims and their impact on wheel offset and wobble. | 22th Apr 1926 | Box 42 \ 1 Scan052 | |
| 10,000-mile test on 20 HP low-pressure tyres on well-base rims. | 23th Apr 1926 | Box 42 \ 1 Scan053 | |
| Query about the standardisation sheet for semi-low pressure tyres on well-base wheels, as a chassis is being held up. | 20th Apr 1926 | Box 42 \ 1 Scan054 | |
| Standardisation of well base wheels and tyres for the 20 HP model after road testing. | 1st Apr 1926 | Box 42 \ 1 Scan055 | |
| 10,000-mile test of 20 HP low pressure tyres on well base rims. | 22th Apr 1926 | Box 42 \ 1 Scan056 | |
| Implementation of well-base rims on the 20 HP and 40/50 HP chassis. | 28th Apr 1926 | Box 42 \ 1 Scan057 | |
| High-speed wobbles experienced with well-base rims and medium pressure tyres, comparing the 20 HP and 40/50 HP models. | 28th Apr 1925 | Box 42 \ 1 Scan058 | |
| Telephone message from Dunlop Co. regarding difficulties in manufacturing wire wheels with wellbase rims. | 4th May 1926 | Box 42 \ 1 Scan059 | |
| Measurements and standards for wire wheels with well-base rims for 20 HP and 40/50 HP chassis. | 6th May 1926 | Box 42 \ 1 Scan060 | |
| Blueprint comparing dimensions and load ratings for four different tyre types and sizes. | 14th May 1926 | Box 42 \ 1 Scan061 | |
| Blank page with a Print Room ink stamp. | 14th May 1926 | Box 42 \ 1 Scan062 | |
| Standardisation of chassis parts, specifically well base rims and 5 1/4' tyres. | 4th May 1926 | Box 42 \ 1 Scan063 | |
| Correction notice from Dunlop regarding the classification and description of certain tyres. | 1st Jun 1926 | Box 42 \ 1 Scan064 | |
| Standardisation Sheet No.3809, confirming the safety of fitting low-pressure tyres to 20 HP cars without hydraulic dampers. | 9th Jun 1926 | Box 42 \ 1 Scan065 | |
| Essential need for hydraulic dampers on the 20 HP model to prevent high-speed wobbles. | 11th Jun 1926 | Box 42 \ 1 Scan066 | |
| Continued memorandum regarding the adoption of a standardisation sheet by company engineers. | 1st Jul 1926 | Box 42 \ 1 Scan067 | |
| Supply and types of wheels for the Phantom model, including timelines for shock dampers. | 1st Jul 1926 | Box 42 \ 1 Scan068 | |
| Choice of wheel and tyre type for the 40/50 HP chassis. | 8th Jul 1926 | Box 42 \ 1 Scan069 | |
| Replacing wire wheels with well-base rims on Chassis 12-EX due to them fouling the brake drums. | 20th Jul 1926 | Box 42 \ 1 Scan070 | |
| Request to obtain Dunlop tyres for tests on a 12-EX car in France. | 20th Aug 1926 | Box 42 \ 1 Scan071 | |
| Standardisation of wheels with well base rims and 6.75 inch tyres. | 6th Sep 1926 | Box 42 \ 1 Scan072 | |
| The change from Traction Tread to a new triple stud pattern for 6.75' Dunlop tyres, noting performance issues and further modifications. | 21th Sep 1926 | Box 42 \ 1 Scan073 | |
| High-speed wobble issues with well-based wheels and collaboration with Dunlop for improved tyre tests. | 21th Sep 1926 | Box 42 \ 1 Scan074 | |
| Clarifying the cost calculations for wheels, tyres, and hubs detailed in Standardisation Sheet No. X.3809. | 29th Sep 1926 | Box 42 \ 1 Scan075 | |
| Confirming a car will be sent to Derby to be fitted with hydraulic dampers, well-base wheels, and new tyres. | 8th Oct 1926 | Box 42 \ 1 Scan076 | |
| Exchange of wheels and tyres for specific test vehicles. | 14th Oct 1926 | Box 42 \ 1 Scan077 | |
| Collection of six well base wheels off car 88-LC. | 18th Oct 1926 | Box 42 \ 1 Scan078 | |
| Further tests on well base wheels for the 88-LC Trials Saloon and Mr. Royce's car. | 19th Oct 1926 | Box 42 \ 1 Scan079 | |
| Standardization of tyres, rims, and front axle for the Phantom C.2 Series. | 21th Oct 1926 | Box 42 \ 1 Scan080 | |
| The transition from standard wheels to well-base rims and balloon tyres, and the policy for using up old stock. | 25th Oct 1925 | Box 42 \ 1 Scan081 | |
| Order of six traction tread tyres from Messrs. Dunlops. | 11th Nov 1926 | Box 42 \ 1 Scan082 | |
| Joint position on inner tubes supplied by the Dunlop Co. for wire wheels with wellbase rims. | 29th Nov 1926 | Box 42 \ 1 Scan083 | |
| The joint position on inner tubes for Phantom wire wheels with well base rims. | 30th Nov 1926 | Box 42 \ 1 Scan084 | |
| Supply and standardisation of well base rims and medium pressure tyres for a Phantom chassis. | 30th Nov 1926 | Box 42 \ 1 Scan085 | |
| Standardisation of 6.75' traction tread well base rims on the old type axle to increase riding comfort. | 29th Nov 1926 | Box 42 \ 1 Scan086 | |
| Standardisation sheet for 6.75 traction well base wheels and tyres with costings and conditions of application. | 27th Aug 1927 | Box 42 \ 1 Scan087 | |
| Internal order for six Dunlop outer covers and six inner tubes for a 20 HP car, chassis 10-G-111. | 27th Aug 1927 | Box 42 \ 1 Scan088 | |
| Letter to The Dunlop Rubber Co. postponing a demonstration of well base rims and tyres due to the Olympia Show. | 21th Oct 1927 | Box 42 \ 1 Scan089 | |
| Letter to The Dunlop Rubber Co. arranging a meeting at Fort Dunlop. | 26th Oct 1927 | Box 42 \ 1 Scan090 | |
| Tests to ascertain if standard balloon tyres leave the well base rim when deflated. | 29th Oct 1927 | Box 42 \ 1 Scan091 | |
| Tyre and rim experiments, detailing performance during punctures, high-speed cornering, and potential safety modifications. | 17th Oct 1927 | Box 42 \ 1 Scan092 | |
| Deflation tests performed on large tyres. | 17th Oct 1927 | Box 42 \ 1 Scan093 | |
| Comparing the average mileage of well base tyres against straight-sided cord tyres. | 17th Nov 1927 | Box 42 \ 1 Scan094 | |
| And comparing the mileage and wear of different tyre types. | 28th Nov 1927 | Box 42 \ 1 Scan095 | |
| List detailing the weights of various wheel and tyre combinations for a 20 HP model. | 19th Aug 1928 | Box 42 \ 1 Scan096 | |
| Carburetter options and procurement for the Eagle 16 engine. | 11th Sep 1925 | Box 42 \ 1 Scan097 | |
| Mr. Royce's instructions for testing the RR. E.16 engine without a supercharger, including alternative damping and carburetion methods. | 11th Dec 1925 | Box 42 \ 1 Scan098 | |
| Continued memo discussing temporary instruments and the aim of running an engine without the supercharger. | 15th Dec 1925 | Box 42 \ 1 Scan099 | |
| Reminder about a proposal to test an Eagle XVI engine with four carburetters after deleting the supercharger. | 15th Dec 1925 | Box 42 \ 1 Scan100 | |
| Two schemes for mounting carburettors and induction pipes on an Eagle 16 engine for bench testing. | 30th Dec 1925 | Box 42 \ 1 Scan101 | |
| Modifications to the water connections for the Eagle 16 engine. | 14th Nov 1925 | Box 42 \ 1 Scan102 | |
| Blueprint drawing of induction pipes and engine mounting for the Eagle 16 engine. | 14th Nov 1925 | Box 42 \ 1 Scan103 | |
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