| Description | Date | Identifier | |
| Potential adoption of Dunlop straight-sided tyres and the necessary testing required beforehand. | 2nd Jun 1921 | Box 45 \ 1 Scan207 | |
| Declining an offer for Englebert tyres, citing sufficient stock and an upcoming standardisation to straight-sided tyres. | 11th Jun 1921 | Box 45 \ 1 Scan208 | |
| Availability and performance of straight-sided tyres, comparing cord construction with woven fabric. | 20th Jun 1921 | Box 45 \ 1 Scan209 | |
| Comparison of mileage and performance between cord and woven fabric tyres. | 20th Jun 1921 | Box 45 \ 1 Scan210 | |
| Tyre pressures for cars of varying weights, and a recommendation to standardise straight-sided cord construction tyres, listing their advantages. | 20th Jun 1921 | Box 45 \ 1 Scan211 | |
| Letter to the Dunlop Rubber Co. Ltd. regarding the standardization of wheels and collective experience with straight-sided tyres. | 20th Jun 1921 | Box 45 \ 1 Scan212 | |
| Tyre pressures, comparing woven and cord fabric tyres and recommending pressures based on vehicle weight. | 20th Jun 1921 | Box 45 \ 1 Scan213 | |
| Cover note attaching a report on straight-sided tyres. | 20th Jun 1921 | Box 45 \ 1 Scan214 | |
| Requesting cost details for a standardisation sheet on straight-sided tyres with cord fabric. | 21th Jun 1921 | Box 45 \ 1 Scan215 | |
| Performance, running costs, and issues with straight-sided cord tyres in post-war conditions. | 22th Jun 1921 | Box 45 \ 1 Scan216 | |
| Suspension design, comparing spring types and the need for increased damping due to new tyre technology, specifically for the Goshawk 11 model. | 22th Jun 1921 | Box 45 \ 1 Scan217 | |
| Adoption of straight-sided cord tyres, their performance, and use on the 'Goshawk' model. | 22th Jun 1921 | Box 45 \ 1 Scan218 | |
| Letter from Dunlop Rubber Co Ltd regarding Straight Side Tyres and Inflation Pressures. | 22th Jun 1921 | Box 45 \ 1 Scan219 | |
| Cover letter to The Dunlop Rubber Co. Ltd. enclosing a mileage report for the attention of Mr. W. Bond. | 1st Jul 1921 | Box 45 \ 1 Scan220 | |
| Test log for Dunlop straight-sided tyres, tracking daily and total mileage. | 25th Jun 1921 | Box 45 \ 1 Scan221 | |
| Daily log of vehicle testing, detailing tyre configurations, mileage, routes, and performance remarks. | 20th May 1921 | Box 45 \ 1 Scan222 | |
| Log sheet detailing tyre performance, mileage, and condition over several test runs. | 21th May 1921 | Box 45 \ 1 Scan223 | |
| Log sheet detailing daily tyre usage, mileage, routes, and performance remarks. | 5th Jun 1921 | Box 45 \ 1 Scan224 | |
| Letter from Dunlop Rubber Co Ltd requesting the return of finished tyre covers for examination. | 5th Jul 1921 | Box 45 \ 1 Scan225 | |
| The standardization of Dunlop wheels with demountable rims and the availability of various tyre types. | 6th Jul 1921 | Box 45 \ 1 Scan226 | |
| Justification for the change to demountable rims and straight-sided tyres, citing it as an industry-wide improvement. | 6th Jul 1921 | Box 45 \ 1 Scan227 | |
| Letter from Dunlop Rubber Co Ltd regarding a delayed response due to staff absence and ongoing tests. | 8th Jul 1921 | Box 45 \ 1 Scan228 | |
| Request for cost information regarding the standardisation sheet for straight-sided tyres with cord fabric. | 12th Jul 1921 | Box 45 \ 1 Scan229 | |
| Follow-up letter from Dunlop Rubber Co Ltd regarding a previous request for tyres. | 19th Jul 1921 | Box 45 \ 1 Scan230 | |
| Letter from Dunlop Rubber Co. regarding the adoption of Straight Side tyres for the 1922 season. | 19th Jul 1921 | Box 45 \ 1 Scan231 | |
| The standardisation and global availability of Dunlop straight-sided tyres. | 19th Jul 1921 | Box 45 \ 1 Scan232 | |
| Seeking confirmation on the suitability and testing of demountable rims for straight-sided tyres. | 19th Jul 1921 | Box 45 \ 1 Scan233 | |
| Covering letter for a standardisation sheet on straight-sided tyres with cord fabric. | 20th Jul 1921 | Box 45 \ 1 Scan234 | |
| Standardisation of demountable rims for straight-sided tyres, comparing American-made wheels with those made by Dunlop. | 20th Jul 1921 | Box 45 \ 1 Scan235 | |
| Attaching a standardisation sheet for straight-sided tyres with cord fabric. | 20th Jul 1921 | Box 45 \ 1 Scan236 | |
| Dunlop Straight Side Tyres and an accompanying booklet. | 21th Jul 1921 | Box 45 \ 1 Scan237 | |
| Return of two Dunlop covers loaned for testing. | 21th Jul 1921 | Box 45 \ 1 Scan238 | |
| Introduction of straight-sided tyres and Dunlop wheels with Goodyear rims, referencing a sales conference decision. | 28th Jul 1921 | Box 45 \ 1 Scan239 | |
| Standardisation report for straight-sided tyres with cord fabric on chassis. | 20th Jun 1921 | Box 45 \ 1 Scan240 | |
| Cost difference between Beaded Type and Straightsided Tyres. | 8th Aug 1921 | Box 45 \ 1 Scan241 | |
| Letter from Dunlop Rubber Co Ltd chasing a delivery of finished covers. | 15th Aug 1921 | Box 45 \ 1 Scan242 | |
| Letter to Dunlop Ltd. regarding a delay in the dispatch of finished Covers due to a works holiday. | 18th Aug 1921 | Box 45 \ 1 Scan243 | |
| Communication regarding a Dunlop Rim with a removable flange for a straight side tyre, quoting a letter from Dunlop Rubber Co. Ltd. | 22th Sep 1921 | Box 45 \ 1 Scan244 | |
| Circulating a letter and booklet from Dunlop Rubber Co. Ltd. about their pneumatic motor tyres for 1921-1922. | 10th Oct 1921 | Box 45 \ 1 Scan245 | |
| Letter from Dunlop Rubber Co. detailing the features of their Straight Side Pneumatic Motor Tyres and enclosing a 1922 tyre booklet. | 30th Sep 1921 | Box 45 \ 1 Scan246 | |
| Bulletin detailing various Dunlop tyre types, sizes, and recommendations for the 1922 season. | 1st Jan 1922 | Box 45 \ 1 Scan247 | |
| Letter from Dunlop Rubber Co. detailing the transition from non-standard to British Standard light car tyre sizes for the 1922 season. | 13th Jan 1922 | Box 45 \ 1 Scan248 | |
| Internal memorandum regarding the standardisation of straight-sided tyres and wire wheels. | 13th Jan 1922 | Box 45 \ 1 Scan249 | |
| Extract from a Sales Conference asking the Works about the size difference between straight-sided and beaded-edged tyres. | 25th Jan 1922 | Box 45 \ 1 Scan250 | |
| Comparing the diameters of Dunlop straight-sided and beaded tyres and the negligible effect on the gear ratio. | 27th Jan 1922 | Box 45 \ 1 Scan251 | |
| Urgent request for two 33 X 5 Dunlop straight sided tyre covers for a car going to France. | 13th Feb 1922 | Box 45 \ 1 Scan252 | |
| Request from Dunlop for performance data on their test tyres. | 10th Mar 1922 | Box 45 \ 1 Scan253 | |
| Attaching a list of Dunlop Test tyres and their mileage. | 20th Mar 1922 | Box 45 \ 1 Scan254 | |
| Log of mileage and condition for Dunlop test tyres on a test car. | 17th Mar 1922 | Box 45 \ 1 Scan255 | |
| Potential fitting issues with straight-sided Dunlop cord tyres and rims. | 25th Apr 1922 | Box 45 \ 1 Scan256 | |
| Puncture experience with straight-sided Dunlop Cord Tyres & Rims, and the need for further investigation. | 26th Apr 1922 | Box 45 \ 1 Scan257 | |
| Puncture experience with straight-sided Dunlop Cord tires and rims. | 26th Apr 1922 | Box 45 \ 1 Scan258 | |
| Letter concerning a defective Dunlop tire, wheel, and flange on vehicle 107-MG, following a puncture incident near Paris. | 26th Apr 1922 | Box 45 \ 1 Scan259 | |
| Puncture experience with straight-sided Dunlop cord tires and rims, proposing further investigation and testing. | 26th Apr 1922 | Box 45 \ 1 Scan260 | |
| Letter to Mr. Belnap of Rolls-Royce of America, requesting experience on the use of straight-sided Dunlop cord tyres and rims in America. | 27th Apr 1922 | Box 45 \ 1 Scan261 | |
| The performance and safety of straight-sided Dunlop cord tyres and rims compared to other types. | 28th Apr 1922 | Box 45 \ 1 Scan262 | |
| Safety test comparison of Stanwell, Goodyear, and Firestone demountable rims and straight-sided tyres. | 19th May 1920 | Box 45 \ 1 Scan263 | |
| Standardising wheels with Goodyear rims for English and American chassis. | 22th May 1922 | Box 45 \ 1 Scan264 | |
| Complaint about a faulty Dunlop tyre on a Delage car and a request for a replacement. | 22th May 1922 | Box 45 \ 1 Scan265 | |
| Acknowledging receipt of an 880 X 120 mm cover and awaiting an update from Dunlop regarding another. | 30th May 1922 | Box 45 \ 1 Scan266 | |
| Comparing the performance of Rudge-Whitworth and Dunlop detachable wire wheels. | 6th Feb 1922 | Box 45 \ 1 Scan267 | |
| Complaint and replacement offer for a Dunlop tyre cover for a Delage car. | 8th Jun 1922 | Box 45 \ 1 Scan268 | |
| Offer for Dunlop Magnum canvas covers and the decision to only purchase cord fabric tyres. | 9th Jun 1922 | Box 45 \ 1 Scan269 | |
| The possibility of fitting a locking arrangement to straight side Dunlop rims and commenting on the slow sales of straight side tyres. | 1st Jun 1922 | Box 45 \ 1 Scan270 | |
| Letter from Dunlop Rubber Co. Ltd. to Rolls-Royce Ltd. concerning a locking device for straight-sided rims. | 10th Jun 1922 | Box 45 \ 1 Scan271 | |
| The stock and ordering of second-hand Dunlop tyres for testing purposes. | 18th Jul 1922 | Box 45 \ 1 Scan272 | |
| Letter from Dunlop Rubber Co Ltd regarding a sample operating tool for straight side rims being sent for testing. | 21th Jul 1922 | Box 45 \ 1 Scan273 | |
| Redesigning an operating tool for straight-sided tyres, as the one supplied by Dunlop was incorrect. | 24th Jul 1922 | Box 45 \ 1 Scan274 | |
| Letter from Dunlop Rubber Co Ltd concerning issues with security bolts and valve plates on tyres. | 26th Jul 1922 | Box 45 \ 1 Scan275 | |
| Letter from D.R. Co., Ltd. concerning issues with tyre security bolts, pressure, and test results. | 26th Jul 1922 | Box 45 \ 1 Scan276 | |
| Letter from Dunlop Rubber Co. Ltd. advising against the use of security bolts with Cord Tyres. | 28th Jul 1922 | Box 45 \ 1 Scan277 | |
| Arrangement with the Dunlop Co. for the supply of Straight Side Tyres on consignment for 40/50 Chassis. | 9th Aug 1922 | Box 45 \ 1 Scan278 | |
| Letter from Dunlop Rubber Co. regarding the stocking of Straight Side Tyres for renewals. | 1st Aug 1922 | Box 45 \ 1 Scan279 | |
| Recommendation by Dunlop and Michelin to abandon the use of security bolts for tyres, especially cord tyres. | 1st Aug 1922 | Box 45 \ 1 Scan280 | |
| Recommending the discontinuation of security bolts on cord tyres based on testing and discussions with Dunlop. | 26th Jul 1922 | Box 45 \ 1 Scan281 | |
| Letter from Dunlop Rubber Co. regarding security bolts and valve plates on cord tyres. | 26th Jul 1922 | Box 45 \ 1 Scan282 | |
| Letter from Dunlop Rubber Co. Ltd. regarding tyre tests and recommendations on security bolts. | 10th Aug 1922 | Box 45 \ 1 Scan283 | |
| Letter to Dunlop Rubber Co. regarding safety issues with demountable tyre rings coming off wheels on experimental cars. | 10th Aug 1922 | Box 45 \ 1 Scan284 | |
| Letter discussing failures with straight-sided tyres and demountable rims, requesting a test to reject faulty wheels. | 10th Aug 1922 | Box 45 \ 1 Scan285 | |
| Complaint regarding a retaining rim that disappeared from the wheel after a rear tyre failure. | 10th Aug 1922 | Box 45 \ 1 Scan286 | |
| Complaint regarding a puncture and the fitting of tyres by Dunlop Co. on car 107-MG. | 16th Aug 1924 | Box 45 \ 1 Scan287 | |
| Letter from Dunlop regarding issues with detachable flanges on straight side rims for experimental cars. | 16th Aug 1924 | Box 45 \ 1 Scan288 | |
| Letter from Dunlop Rubber Co. Ltd. concerning a test for wheel rings and advising against a locking device. | 16th Aug 1922 | Box 45 \ 1 Scan289 | |
| Letter to Dunlop Rubber Co. regarding demountable flanges coming off straight-sided rims when tyres deflate. | 13th Sep 1922 | Box 45 \ 1 Scan290 | |
| Letter discussing issues with demountable wheel flanges and modifications to Dunlop wheels and straight-sided rims. | 14th Sep 1922 | Box 45 \ 1 Scan291 | |
| Letter from Dunlop Rubber Co Ltd acknowledging receipt of a complaint regarding straight side rims and flanges. | 14th Sep 1922 | Box 45 \ 1 Scan292 | |
| Letter from Dunlop Rubber Co. Ltd. arranging a meeting about straight side rims and flange grip. | 20th Sep 1922 | Box 45 \ 1 Scan293 | |
| Agreement with Dunlop Rubber Co. to exchange wheels on the 'School Car' for a new set at no charge. | 22th Sep 1922 | Box 45 \ 1 Scan294 | |
| Demountable straight-sided rims coming off when tyres deflate and the subsequent fix developed with Dunlop. | 30th Sep 1922 | Box 45 \ 1 Scan295 | |
| Letter from Dunlop Rubber Co Ltd regarding the dispatch of straight side flanges for 32' x 4 1/2' rims. | 2nd Oct 1922 | Box 45 \ 1 Scan296 | |
| Correct fitting direction for Dunlop tyres with traction tread and the resulting interchangeability issues. | 10th Oct 1922 | Box 45 \ 1 Scan297 | |
| The impracticability of fitting Dunlop traction tread tyres in a specific direction. | 10th Oct 1922 | Box 45 \ 1 Scan298 | |
| The fitting direction of Dunlop Traction Tread tyres. | 13th Oct 1922 | Box 45 \ 1 Scan299 | |
| Letter from Dunlop Rubber Co. Ltd. concerning the direction of rotation for straight side tyres. | 7th Oct 1922 | Box 45 \ 1 Scan300 | |
| From the Test Department regarding the stock of second-hand Dunlop tyres. | 14th Dec 1922 | Box 45 \ 1 Scan301 | |
| Request to supply four Dunlop straight-sided covers, size 895 X 135. | 5th Apr 1923 | Box 45 \ 1 Scan302 | |
| Letter to The Dunlop Rubber Co. complaining about noise from their straight-sided tyres. | 31th May 1923 | Box 45 \ 1 Scan303 | |
| Letter to Dunlop requesting follow-up data on tyre tests regarding tractive resistance, braking, and balloon tyres. | 17th Aug 1923 | Box 45 \ 1 Scan304 | |
| Print of an 'Almost Brand New' Dunlop Cord tyre tread pattern after 1500 miles. | 1st Sep 1923 | Box 45 \ 1 Scan305 | |
| Ink pad imprint of a Dunlop Cord front wheel tyre tread pattern after 1500 miles. | 1st Sep 1923 | Box 45 \ 1 Scan306 | |
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