| Description | Date | Identifier | |
| Retail price list and conditions of sale for B.T.R. tyres, including load and air-pressure schedules. | 27th Sep 1935 | Box 158 \ 1 scan0088 | |
| Price list and specification sheet for B.T.R. (formerly British Goodrich) car tyres. | 27th Sep 1935 | Box 158 \ 1 scan0089 | |
| Promotional leaflet for B.T.R. Gilt-edged tyres, highlighting the heat-resistant 'Lifeguard Golden Ply' feature. | 27th Sep 1935 | Box 158 \ 1 scan0090 | |
| Advertisement for B.T.R. Gilt-edged Golden Ply tyres, highlighting their safety features against bursts. | 9th Jan 1936 | Box 158 \ 1 scan0091 | |
| Letter from Firestone Tyre & Rubber Co. Ltd. regarding experiments to be conducted on their 'R.O.' pattern tyres. | 9th Jan 1936 | Box 158 \ 1 scan0092 | |
| Letter to Firestone Tyre & Rubber Co. Ltd. requesting a section of an R.O. series tyre for examination. | 17th Jan 1936 | Box 158 \ 1 scan0093 | |
| Letter from Firestone Tyre & Rubber Company regarding the unavailability of a requested tyre section, proposing to send a full set for testing silent running. | 25th Jan 1936 | Box 158 \ 1 scan0094 | |
| Letter to Firestone Tyre & Rubber Co. Ltd. regarding the noise level of a sample tyre they provided. | 3rd Feb 1936 | Box 158 \ 1 scan0095 | |
| Optimal front tyre pressures for Bentley cars, comparing the recommended 30 lbs with the observed better performance at 35 lbs. | 15th Oct 1936 | Box 158 \ 1 scan0096 | |
| Excessive tyre noise on the 25/30 HP chassis trials car GUL-1 and proposing collaboration with Dunlop for a quieter tyre. | 24th Nov 1936 | Box 158 \ 1 scan0097 | |
| Tyre noise on a 25/30 HP chassis and potential solutions. | 24th Nov 1936 | Box 158 \ 1 scan0098 | |
| Tyre noise, confirming tyres from car GUL-1 were sent to the Dunlop Company for inspection. | 3rd Dec 1936 | Box 158 \ 1 scan0099 | |
| The dispatch of parts for two special Bentley wheels to Messrs. Dunlop's. | 3rd Dec 1936 | Box 158 \ 1 scan0100 | |
| Tyre noise and the testing of Dominion Royal Master Centipede Tread tyres on vehicle GUL-1. | 9th Dec 1936 | Box 158 \ 1 scan0101 | |
| Reduction of tyre noise on a Phantom III by inserting rubber between the axle and springs. | 17th Dec 1936 | Box 158 \ 1 scan0102 | |
| Parts required for addressing tyre noise on a Phantom III model, referencing a previous communication. | 18th Dec 1936 | Box 158 \ 1 scan0103 | |
| Arranging to send car 3-AZ-22 for modifications to address tyre noise. | 22th Dec 1936 | Box 158 \ 1 scan0104 | |
| Tyre noises on a Phantom III car, confirming the availability of springs. | 23th Dec 1936 | Box 158 \ 1 scan0105 | |
| Tyre noise in a Phantom III Trials Pullman car, noting that adding rubber between the axle and rear springs made the noise worse. | 5th Jan 1937 | Box 158 \ 1 scan0106 | |
| Tyre noise issues on a Phantom III vehicle. | 6th Jan 1937 | Box 158 \ 1 scan0107 | |
| Dominion and Dunlop tyres, focusing on tread design, noise, and non-skid properties. | 7th Jan 1937 | Box 158 \ 1 scan0108 | |
| Order for tyres for a Phantom III vehicle. | 22th Jan 1937 | Box 158 \ 1 scan0109 | |
| Specification sheet detailing the weights of Dunlop and India brand wheel and tyre assemblies. | 22th Jan 1937 | Box 158 \ 1 scan0110 | |
| Test report comparing two sets of large size tires against a standard set. | 15th Jun 1937 | Box 158 \ 1 scan0111 | |
| Comparing the tyre sizes on the Phantom III to those on Humber models. | 15th Jun 1937 | Box 158 \ 1 scan0112 | |
| Comparison of tyre specifications for the Phantom III, Phantom II, and Humber 'Snipe' models. | 21th Jun 1937 | Box 158 \ 1 scan0113 | |
| Letter to R.M. Papelian confirming an order for four General Dual-10 Tyres following a discussion at the Olympia Show. | 23th Jun 1937 | Box 158 \ 1 scan0114 | |
| The purchase of a set of four General Dual-10 tyres for a Wraith. | 23th Jun 1937 | Box 158 \ 1 scan0115 | |
| Letter from R.M. Papelian Limited acknowledging a letter and discussing an order for four General Dual-10 tyres. | 25th Jun 1937 | Box 158 \ 1 scan0116 | |
| Telegram received by telephone regarding a tyre order. | 28th Jun 1937 | Box 158 \ 1 scan0117 | |
| Telegram chasing an official order for tyres and proposing to cable immediately to save time. | 28th Jun 1937 | Box 158 \ 1 scan0118 | |
| Letter from a motor car equipment supplier regarding an unreceived official order for tyres. | 28th Jun 1937 | Box 158 \ 1 scan0119 | |
| Confirmation of a telegram regarding a delayed official order for tyres. | 20th Sep 1934 | Box 158 \ 1 scan0120 | |
| Letter from a motor car equipment supplier concerning tyres, Bentley car performance, and piston ring standards. | 30th Jun 1937 | Box 158 \ 1 scan0121 | |
| Letter to Mr. Papelian regarding tyres and ongoing experiments with rings and cylinder wear. | 2nd Jul 1937 | Box 158 \ 1 scan0122 | |
| Letter from a motor equipment supplier regarding the GENERAL Dual-10 tyre and a proposed road test. | 15th Jul 1937 | Box 158 \ 1 scan0123 | |
| Preprint paper on the subject of tire noise by Arthur W. Bull of the U.S. Tire Co., Inc. | 22th Jan 1934 | Box 158 \ 1 scan0124 | |
| Study on the methods for measuring and classifying tire noise. | 22th Jan 1934 | Box 158 \ 1 scan0125 | |
| Page from a report discussing the causes of tire noise and the equipment used for testing. | 22th Jan 1934 | Box 158 \ 1 scan0126 | |
| Experimental results and audio transcript detailing tire impact noise tests. | 22th Jan 1934 | Box 158 \ 1 scan0127 | |
| Study on tire noise, comparing different tread designs and the effect of irregular tread spacing on noise characteristics. | 22th Jan 1934 | Box 158 \ 1 scan0128 | |
| Analysis of noises produced by tires under various road conditions and test scenarios. | 22th Jan 1934 | Box 158 \ 1 scan0129 | |
| Technical analysis of tire noise on turns, comparing different tread designs and their performance under various conditions. | 22th Jan 1934 | Box 158 \ 1 scan0130 | |
| Concluding page of a discussion on tire design, focusing on noise reduction and antiskid properties. | 13th Sep 1937 | Box 158 \ 1 scan0131 | |
| Request from dealer Jack Olding to fit Dunlop tyres on Bentleys instead of India tyres due to customer complaints. | 13th Sep 1937 | Box 158 \ 1 scan0132 | |
| Letter from R.M. Papelian Limited regarding the performance of different tyre brands (General, India, Goodyear) and brakes on a Bentley. | 13th Sep 1937 | Box 158 \ 1 scan0133 | |
| Fitting Dunlop tyres on a Bentley chassis and testing new tyres from India. | 15th Sep 1937 | Box 158 \ 1 scan0134 | |
| Letter discussing the performance characteristics and endurance of general tyres. | 28th Sep 1937 | Box 158 \ 1 scan0135 | |
| Letter from R.M. Papelian Limited regarding tyre tests, noise complaints, and an offer to test a Bentley chassis. | 1st Oct 1937 | Box 158 \ 1 scan0136 | |
| Letter discussing the performance tests of General Dual-10 tyres compared to standard tyres. | 5th Oct 1937 | Box 158 \ 1 scan0137 | |
| Results of tyre tests and arranging for a new trial on a Bentley. | 28th Oct 1937 | Box 158 \ 1 scan0138 | |
| Reported foul on a body bracket due to large tyres, suggesting a modification. | 28th Oct 1937 | Box 158 \ 1 scan0139 | |
| Feasibility and advantages of fitting larger tyres to Bentley models. | 28th Oct 1937 | Box 158 \ 1 scan0140 | |
| Clearance issues with new 6.50 x 17 wheels and tyres on a Bentley chassis. | 28th Oct 1937 | Box 158 \ 1 scan0141 | |
| The turning circle figures for a Bentley with both normal and restricted steering lock. | 19th Oct 1937 | Box 158 \ 1 scan0142 | |
| The tyre fouling issues when fitting larger 6.5 x 17' wheels to a standard Park Ward saloon. | 21th Oct 1937 | Box 158 \ 1 scan0143 | |
| Tyre clearance issues on a Bentley after fitting larger 6.5 x 17' wheels. | 21th Oct 1937 | Box 158 \ 1 scan0144 | |
| Photograph showing a car's wire-spoked wheel fitted with an India tyre and snow chains, jacked up off the ground. | 30th Oct 1937 | Box 158 \ 1 scan0145 | |
| Request for nine prints from negatives showing the offside and nearside wings of a Bentley with big tyres. | 30th Oct 1937 | Box 158 \ 1 scan0146 | |
| Specifications and fitting of 6 1/2 inch Bentley tyres. | 30th Oct 1937 | Box 158 \ 1 scan0147 | |
| Safety implications and recommendations for fitting snow chains/shoes to the front wheels of Bentley cars. | 4th Nov 1937 | Box 158 \ 1 scan0148 | |
| Feasibility and effects of fitting snow chains to front wheels. | 1st Nov 1937 | Box 158 \ 1 scan0149 | |
| Statement on the use of chains on the front wheels of 15,000 miles cars. | 9th Nov 1937 | Box 158 \ 1 scan0150 | |
| The use of Dominion and India tyres on a Bentley. | 9th Nov 1937 | Box 158 \ 1 scan0151 | |
| Customer's inquiry about tyre performance and suitability for a Bentley. | 8th Nov 1937 | Box 158 \ 1 scan0152 | |
| Feasibility and implications of fitting 7½ inch tyres on Phantom III cars. | 18th Nov 1937 | Box 158 \ 1 scan0153 | |
| Decision to fit a car with 6 1/2' tyres and arranging the supply of a set of five wheels and tyres. | 18th Nov 1937 | Box 158 \ 1 scan0154 | |
| The results of road testing larger 6 1/2' tyres on a Bentley. | 17th Nov 1937 | Box 158 \ 1 scan0155 | |
| Performance of 7½ inch tyres on the Phantom III model. | 19th Nov 1937 | Box 158 \ 1 scan0156 | |
| Fitting of large tyres on two different Bentley cars. | 24th Nov 1937 | Box 158 \ 1 scan0157 | |
| Order for various tyres, inner tubes, and wheels. | 24th Nov 1937 | Box 158 \ 1 scan0158 | |
| Vehicle test report on a Bentley chassis detailing rattles, steering, braking, and ride quality. | 25th Nov 1937 | Box 158 \ 1 scan0159 | |
| The performance of special variable pitch tyres after initial mileage on 25/30 and Phantom III models. | 27th Nov 1937 | Box 158 \ 1 scan0160 | |
| Letter to S.S. Tresilian requesting tyre prices due to a suspicion of being overcharged. | 1st Dec 1937 | Box 158 \ 1 scan0161 | |
| Letter to S.S. Tresilian asking for tyre pricing information to investigate being overcharged, with a handwritten reply detailing rebates. | 1st Dec 1937 | Box 158 \ 1 scan0162 | |
| Leaflet for a rotating pressure joint developed by A. Schrader's Son. | 1st Dec 1937 | Box 158 \ 1 scan0163 | |
| Promotional document describing the Schrader Rotating Pressure Joint, its mechanism, and various applications in vehicles. | 6th Dec 1937 | Box 158 \ 1 scan0164 | |
| Inquiry to The British Goodrich Rubber Co. Ltd. about the availability of two new tyre sizes. | 6th Dec 1937 | Box 158 \ 1 scan0165 | |
| Letter from British Tyre & Rubber Co. Ltd. regarding 6½ x 17 and 6½ x 16 Motor Tyres. | 9th Dec 1937 | Box 158 \ 1 scan0166 | |
| Letter from British Tyre & Rubber Co. Ltd. responding to an enquiry about two new tyre sizes. | 11th Dec 1937 | Box 158 \ 1 scan0167 | |
| Letter from Sir Walrond Sinclair about a potential visit to Derby by Mr. Howard. | 19th Jan 1938 | Box 158 \ 1 scan0168 | |
| Letter from British Tyre & Rubber Co. Ltd. regarding a meeting to discuss new tyre sizes. | 18th Jan 1938 | Box 158 \ 1 scan0169 | |
| Letter to Mr. P.W. Howard of British Tyre & Rubber Co., Ltd., to arrange a visit to the Works in Derby. | 22th Jan 1938 | Box 158 \ 1 scan0170 | |
| Brief internal memorandum arranging a meeting with Mr. Howard in response to a request. | 22th Jan 1938 | Box 158 \ 1 scan0171 | |
| Letter from British Tyre & Rubber Co. Ltd. to W.A. Robotham arranging a meeting in Derby. | 24th Jan 1938 | Box 158 \ 1 scan0172 | |
| Letter to Mr. P.W. Howard of British Tyre & Rubber Co., Ltd. arranging a meeting in Derby. | 25th Jan 1938 | Box 158 \ 1 scan0173 | |
| Letter from British Tyre & Rubber Co. Ltd. confirming a meeting arrangement with Mr. Robotham. | 26th Jan 1938 | Box 158 \ 1 scan0174 | |
| Table listing Bentley tyre weights and prices for different sizes and makes. | 29th Jan 1938 | Box 158 \ 1 scan0175 | |
| Order for Dunlop and India brand tyres for experimental use. | 2nd Feb 1938 | Box 158 \ 1 scan0176 | |
| Letter returning loaned cards from various tyre companies. | 4th Feb 1938 | Box 158 \ 1 scan0177 | |
| Internal order request for tyres and tubes for the Experimental Garage. | 3rd Mar 1938 | Box 158 \ 1 scan0178 | |
| Tyre prices and the search for alternative suppliers to Dunlop. | 28th Mar 1938 | Box 158 \ 1 scan0179 | |
| The results of a 2942-mile road test of 7.5' tyres on a Phantom III vehicle. | 25th Apr 1938 | Box 158 \ 1 scan0180 | |
| Testing of 7.5' tyres on a Phantom III model. | 27th Apr 1938 | Box 158 \ 1 scan0181 | |
| Clarifying the effect of different tyre and rim sizes on the turning circle and out-of-centre point for B.111 and B.50 cars. | 4th May 1938 | Box 158 \ 1 scan0182 | |
| Data table comparing turning circles and lock angles for various tyre and rim configurations. | 11th May 1938 | Box 158 \ 1 scan0183 | |
| Summary of test results for Michelin Pilot tyres, comparing ride, handling, cornering power, and noise against standard tyres. | 11th May 1938 | Box 158 \ 1 scan0184 | |
| Release of wheels for the Wraith model, specifically for the first 100 cars and the 'B' series. | 12th May 1938 | Box 158 \ 1 scan0185 | |
| The testing of 7.50 tyres for the Phantom III model, detailing issues with wobble and steering. | 8th Jun 1938 | Box 158 \ 1 scan0186 | |
| Rubbing of a straight rib tyre tread pattern. | 8th Jun 1938 | Box 158 \ 1 scan0187 | |
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