| Description | Date | Identifier | |
| Postponing a meeting with Col. Matthew to discuss a complaint of broken spokes on Dunlop wire wheels for the 'Goshawk 11'. | 18th Sep 1922 | Box 106 \ 4 scan0049 | |
| Broken spoke on a Dunlop wire wheel fitted to a No.4 Goshawk II, suggesting a design change. | 18th Sep 1922 | Box 106 \ 4 scan0050 | |
| From ROY to Hs. urging for the completion of the 'Goshawk' Wheel Report for the Rudge-Whitworth Company. | 2nd Oct 1922 | Box 106 \ 4 scan0051 | |
| Telegram detailing instructions for the collection and modification of vehicle parts. | 27th Oct 1922 | Box 106 \ 4 scan0052 | |
| The performance and issues with Rudge Whitworth wheels fitted to a 20 HP car, detailing noise and rim problems. | 6th Oct 1922 | Box 106 \ 4 scan0053 | |
| Note on the arrangement and failure of Rudge Whitworth wheels due to noise. | 2nd Mar 1923 | Box 106 \ 4 scan0054 | |
| Unsatisfactory results, such as noisy axles and booming, when fitting disc wheels to 20-HP cars. | 2nd Mar 1923 | Box 106 \ 4 scan0055 | |
| Unsatisfactory discs to wheels on 20 HP cars. | 5th Mar 1923 | Box 106 \ 4 scan0056 | |
| Maintaining standard specifications on demonstration cars and the reputation risks of non-standard parts like disc wheels. | 25th Mar 1923 | Box 106 \ 4 scan0057 | |
| Request to supply a sixth spare wheel for 20-HP Chassis No. 184. | 11th Jun 1923 | Box 106 \ 4 scan0058 | |
| Specification sheet detailing the characteristics of Goshawk 11 wheels. | 28th Jun 1923 | Box 106 \ 4 scan0059 | |
| Despatch of a spare wheel disc and bolt for Mr. Royce's 20 HP car. | 20th Sep 1923 | Box 106 \ 4 scan0060 | |
| Fitting and testing of Rudge Whitworth wheels on a 20 HP car and ordering a new set for a 40/50 HP model. | 6th Nov 1923 | Box 106 \ 4 scan0061 | |
| The testing of Rudge-Whitworth wheels on a 20 HP car, noting they are too tight on the hubs. | 30th Nov 1923 | Box 106 \ 4 scan0062 | |
| Testing, procurement, and standardisation of R.W. wheels versus Dunlop wheels for various car models. | 15th Jan 1924 | Box 106 \ 4 scan0063 | |
| The 10,000-mile performance test of R.W. wheels for 20 HP cars. | 1st Mar 1924 | Box 106 \ 4 scan0064 | |
| Order for a set of wheels and balloon tyres for the 20 HP car. | 25th Sep 1924 | Box 106 \ 4 scan0065 | |
| Internal order request for tyres and tubes for Mr. Royce's 1-G-1 car. | 9th Oct 1924 | Box 106 \ 4 scan0066 | |
| Acquisition and valuation of wire wheels from a 20-HP Chassis for testing purposes. | 17th Apr 1925 | Box 106 \ 4 scan0067 | |
| New locking device for the Goshawk front axle with Dunlop wheels and addressing reports of water ingress. | 8th Aug 1925 | Box 106 \ 4 scan0068 | |
| The necessity of balancing the steering wheels on the 20 HP chassis fitted with FWB. | 26th Aug 1925 | Box 106 \ 4 scan0069 | |
| Adaptation of a balance weight scheme for 20 HP and 40/50 steel artillery wheels. | 23th Jul 1926 | Box 106 \ 4 scan0070 | |
| Selection of suitable wheel and tyre diameters for the 20 HP chassis. | 25th Apr 1927 | Box 106 \ 4 scan0071 | |
| Alteration of a rear tank for increased road clearance. | 6th May 1927 | Box 106 \ 4 scan0072 | |
| Measurement of ground clearance for a 20 HP car fitted with smaller wheels. | 6th May 1927 | Box 106 \ 4 scan0073 | |
| Wheel and tyre dimensions, damage from a recent run, and future testing plans for the 20 HP car. | 24th May 1927 | Box 106 \ 4 scan0074 | |
| Drawing for a new 20 HP wheel with a 19-inch rim. | 24th May 1927 | Box 106 \ 4 scan0075 | |
| Letter to Messrs. Dunlop requesting 3 copies of blueprints for the tyre and 19' rim for the 20 HP car. | 27th May 1927 | Box 106 \ 4 scan0076 | |
| Letter from Dunlop Rubber Co. Ltd. regarding a blueprint request for a tyre on a 19' rim for a 20 HP car. | 30th May 1927 | Box 106 \ 4 scan0077 | |
| Letter to The Dunlop Rubber Co. chasing up drawings that have not yet been received. | 13th Jun 1927 | Box 106 \ 4 scan0078 | |
| Letter from Dunlop Rubber Co. Ltd. regarding drawings for 20 HP wheels with 19' rims. | 14th Jun 1927 | Box 106 \ 4 scan0079 | |
| Letter from Dunlop Rubber Co. enclosing drawings for 20 HP wheels with 19' rims. | 15th Jun 1927 | Box 106 \ 4 scan0080 | |
| Drawing of a tyre and 19' rim for the 20 HP car. | 15th Jun 1927 | Box 106 \ 4 scan0081 | |
| Cross-sectional diagram of a 31' x 6.00' S.S. Balloon Tyre (Buttressed Triple Block). | 14th Jun 1927 | Box 106 \ 4 scan0082 | |
| Letter to Dunlop Rubber Co. requesting an update on the delivery of 19-inch tyres for testing. | 29th Jun 1927 | Box 106 \ 4 scan0083 | |
| Letter from Dunlop Rubber Co. regarding the dispatch of a set of wheels for a 20 HP Car. | 2nd Jul 1927 | Box 106 \ 4 scan0084 | |
| Appearance of the 20 HP model, advocating for the use of 19' wheels with 6' tyres. | 9th Jul 1927 | Box 106 \ 4 scan0085 | |
| Query regarding the use of smaller road wheels on a car. | 14th May 1928 | Box 106 \ 4 scan0086 | |
| Aesthetic and practical issues of fitting smaller wheels to the 20 HP car and the commencement of an 'India 3' build. | 18th May 1928 | Box 106 \ 4 scan0087 | |
| Special details and latest production instructions for the 20 HP car for the Indian market. | 20th Jun 1928 | Box 106 \ 4 scan0088 | |
| Sending a new aluminium turbulent head, hoping for a 30% power increase. | 20th Jun 1928 | Box 106 \ 4 scan0089 | |
| Technical memorandum regarding front and rear wheel clearances for the 'India 3' project. | 26th Jun 1928 | Box 106 \ 4 scan0090 | |
| Various arrangements for luggage and spare wheels at the rear of the 'INDIA 3' model. | 29th Jun 1928 | Box 106 \ 4 scan0091 | |
| Excessive wheel arch clearance on the 20 HP model, suggesting new measurements and requesting confirmation tests. | 1st Jul 1928 | Box 106 \ 4 scan0092 | |
| Urgent message from Royce to Derby requesting wheels, tyres, and rims. | 23th Jul 1928 | Box 106 \ 4 scan0093 | |
| The standardisation and supply of 20' x 6' wheels for the 20 HP model. | 1st Jul 1928 | Box 106 \ 4 scan0094 | |
| Delivery and trial of 20' x 6' wheels and tyres, leading to the cancellation of a rear axle's production. | 1st Aug 1928 | Box 106 \ 4 scan0095 | |
| Reduction of wheel arch height for a 20 HP car with 5 1/4' tyres and 21' rims. | 14th Aug 1928 | Box 106 \ 4 scan0096 | |
| Listing the weights of three different wheel and tyre combinations for a 20 HP vehicle. | 19th Aug 1928 | Box 106 \ 4 scan0097 | |
| Steering 'shiver' at speed and proposed front axle modifications. | 24th Aug 1928 | Box 106 \ 4 scan0098 | |
| Various tyre types and their dimensions for the 20 HP chassis. | 31th Aug 1928 | Box 106 \ 4 scan0099 | |
| Comparison table of various Dunlop wheels and tyres for a 20 HP vehicle. | 14th Nov 1928 | Box 106 \ 4 scan0100 | |
| Design and implementation of a two-wheel carrier arrangement for 'SS' model cars. | 14th Nov 1928 | Box 106 \ 4 scan0101 | |
| Delay and wording of proposed Depot Sheet Hm.93 for 20 HP Wire Wheels. | 20th Dec 1928 | Box 106 \ 4 scan0102 | |
| Letter to Dunlop Rim and Wheel Co. requesting a modification to the wheels of a 20 HP car to increase the track width. | 17th Jan 1929 | Box 106 \ 4 scan0103 | |
| Blueprint for a 20 HP wheel and axle, detailing a required new tyre position. | 17th Jan 1929 | Box 106 \ 4 scan0104 | |
| Request to Dunlop for a modified set of 20 HP 19' rim wheels to match the Phantom specification. | 26th Jan 1929 | Box 106 \ 4 scan0105 | |
| Necessity of special tests on a chassis with smaller wheels before production. | 1st Feb 1929 | Box 106 \ 4 scan0106 | |
| Preparation of a 20 HP test car, chassis modifications, and the decision on wheel sizes. | 11th Feb 1929 | Box 106 \ 4 scan0107 | |
| Arrangement with the Dunlop Co. to scrap rims and build new 19-inch wire wheels for the 20 HP 'O' Series chassis. | 12th Feb 1929 | Box 106 \ 4 scan0108 | |
| Preference for smaller wheels on various car models. | 2nd Feb 1929 | Box 106 \ 4 scan0109 | |
| The suspension of work on wire wheels for the 20-HP 'O' Series chassis. | 12th Mar 1929 | Box 106 \ 4 scan0110 | |
| Letter from Dunlop Rim & Wheel Co. Ltd. confirming the suspension of work on 19' rims and wheels. | 8th Mar 1929 | Box 106 \ 4 scan0111 | |
| Confirming that after further tests, it is safe to proceed with 19' rims for the 20 HP car. | 16th Mar 1929 | Box 106 \ 4 scan0112 | |
| Request to Dunlop for custom wheels to alter the track width of a 40/50 HP car. | 1st May 1929 | Box 106 \ 4 scan0113 | |
| Standardisation of chassis parts for wheels with 19' rims to reduce car height. | 24th Apr 1929 | Box 106 \ 4 scan0114 | |
| Specifying the number of chassis for a new part, the test date, and associated costs. | 29th Apr 1929 | Box 106 \ 4 scan0115 | |
| Instruction for the standardisation of road wheels with 19' rims and narrow hubs for the 20 HP chassis 'P' series. | 16th May 1929 | Box 106 \ 4 scan0116 | |
| Standardisation of chassis parts for 20 HP narrow hubs. | 18th May 1929 | Box 106 \ 4 scan0117 | |
| Fitting of a new part to a 'P' series chassis, including the test date and scrap costs. | 23th Sep 1929 | Box 106 \ 4 scan0118 | |
| Wheel jack requirement specifications for the Phantom II and 20 HP models. | 27th Sep 1929 | Box 106 \ 4 scan0119 | |
| The out-of-balance specification for 6' tyres on 19' rims for the 20 HP chassis. | 14th Feb 1930 | Box 106 \ 4 scan0120 | |
| Solution for out-of-balance 6 inch tyres on 19 inch rims for a 20 HP chassis. | 18th Feb 1930 | Box 106 \ 4 scan0121 | |
| Comparing Dunlop wheels versus Rudge-Whitworth wheels for the 20/25 model, discussing cost and locking systems. | 19th May 1931 | Box 106 \ 4 scan0122 | |
| Order for a modified set of 20/25 HP road wheels based on a reduced price proposal from Dunlop. | 22th May 1931 | Box 106 \ 4 scan0123 | |
| Request to order six road wheels instead of five for a 20/25 HP car destined for France. | 23th May 1931 | Box 106 \ 4 scan0124 | |
| Increasing a wheel order from five to six for a 20/25 HP car destined for France. | 28th May 1931 | Box 106 \ 4 scan0125 | |
| Confirming the universal agreement on using simpler, less costly Dunlop wheels for the future 25HP model. | 28th May 1931 | Box 106 \ 4 scan0126 | |
| Requesting a view on fitting smaller 18-inch wheels to the 25HP model, referencing past issues with the Phantom. | 1st Sep 1931 | Box 106 \ 4 scan0127 | |
| Possibility of reducing the diameter of the wheels on the 25 HP model. | 15th Sep 1931 | Box 106 \ 4 scan0128 | |
| Impact of a change in tyre type on car height and proposing solutions with different wheel rims. | 20th Oct 1931 | Box 106 \ 4 scan0129 | |
| Tyre and wheel specifications for the 25 HP model, focusing on different sizes and their impact on gear ratios. | 23th Oct 1931 | Box 106 \ 4 scan0130 | |
| Correspondence regarding issues with tyre specifications, rolling radius, and wheel rim sizes for 25HP chassis. | 26th Oct 1931 | Box 106 \ 4 scan0131 | |
| The adoption of Dunlop twin spoke wire wheels for the 20/25 HP chassis. | 26th Oct 1931 | Box 106 \ 4 scan0132 | |
| Standardisation of chassis parts, specifically new N.2 Dunlop road wheels with two rows of spokes instead of three. | 8th Oct 1931 | Box 106 \ 4 scan0133 | |
| Standardisation form for a new chassis part, specifying fitment details and costs. | 18th Jan 1928 | Box 106 \ 4 scan0134 | |
| Arguing against the unnecessary expense of sealing road wheel hubs on P.2 & 25 HP models. | 19th Feb 1932 | Box 106 \ 4 scan0135 | |
| Requesting an order for five 18' wheels for the J.III chassis being built in the Experimental Department. | 22th Feb 1932 | Box 106 \ 4 scan0136 | |
| Method of sealing hubs on Phantom II and 25 HP models as a tamper-proof indicator. | 23th Feb 1932 | Box 106 \ 4 scan0137 | |
| Recommendation to accept an offer for a set of six old 20/25 wheels considered scrap. | 14th Jun 1934 | Box 106 \ 4 scan0138 | |
| Recommendation to accept an offer for a set of 6 old type 20/25 wheels removed from a GLN-60 car. | 14th Jun 1934 | Box 106 \ 4 scan0139 | |
| Confirming an agreement for the sale of wheels from vehicle GLN-60. | 21th Jun 1934 | Box 106 \ 4 scan0140 | |
| Memo about arrangements for the wheels of vehicle GLN. 60. | 23th Jun 1934 | Box 106 \ 4 scan0141 | |
| Despatch of five road wheels for Mr. Everndon at Cricklewood. | 27th Jun 1934 | Box 106 \ 4 scan0142 | |
| The despatch of wheels and tyres for chassis GLN-60, and a query regarding the price agreement. | 30th Jun 1934 | Box 106 \ 4 scan0143 | |
| The pricing of partly worn tyres with wheels. | 3rd Jul 1934 | Box 106 \ 4 scan0144 | |
| Letter discussing the performance improvements from new wheels and future design considerations for a Bentley. | 5th Jul 1934 | Box 106 \ 4 scan0145 | |
| Modifications to a 20/25 chassis by fitting smaller wheels to achieve a low gear ratio effect. | 15th Feb 1935 | Box 106 \ 4 scan0146 | |
| Confirming the despatch of a set of 6 x 17 wheels and tyres for a 20/25 car. | 13th Sep 1935 | Box 106 \ 4 scan0147 | |
| Request for the return of two 20/25 HP wheels that were inadvertently sent to Mr. Wyman, which are needed for testing at Lillie Hall. | 6th Nov 1935 | Box 106 \ 4 scan0148 | |
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