Tender wording you can adapt.

This specification covers the supply, fitting and support of a tyre retention device fitted inside the tyre, on the existing wheel, to [number] vehicles of the types listed in Schedule 1, for a contract period of [x] years with [y] option years.

The device is required to keep a deflated tyre seated on the wheel rim after sudden pressure loss, so that the driver retains steering, braking and cornering control and can drive a medium distance at reduced speed to a place of safety.

Lots: Lot 1 passenger cars and vans. Lot 2 ambulances, fire appliances and buses. Lot 3 trucks and trailers on 17.5 to 22.5 inch wheels.

"Tyre retention device" (well-filler band, safety band): a band fitted into the well of a standard one-piece wheel that stops the tyre bead dropping into the well when pressure is lost.

"Run-flat insert": a solid or multi-piece insert mounted on the rim inside the tyre, on which the tyre runs when deflated. Covered by Part B.

"Self-supporting run-flat tyre": a tyre whose reinforced sidewall carries the vehicle at zero pressure, as defined in UNECE Regulation 64. Such tyres are not the subject of this specification.

"Deflated condition": sudden total loss of tyre pressure, by blowout or rapid puncture, at normal operating speed.

"Standard wheel": the vehicle manufacturer’s one-piece steel or alloy wheel with a fitting well.

The device shall lock the tyre to the wheel rim in the deflated condition, so that the tyre does not drop into the fitting well and the rim does not contact the road.

With one or more tyres deflated the vehicle shall remain controllable in steering, braking and cornering through a handling course and slalom. The supplier shall state the test speed and distance achieved.

Tyron reference: TÜV test on a range of vehicles, 3 km at 80 km/h then 3 km at 50 km/h through a handling course and slalom. Certificate and film available.

The device shall give run-flat capability for a medium distance at reduced speed with two or more tyres deflated, sufficient to leave the carriageway or a hazard area and reach a safe place to change the wheel. The supplier shall state the distance.

Tyron reference: a medium distance at reduced speed with two or more deflated tyres (Multiband); up to 50 km with one or more tyres deflated (Multiband HD).

The device shall fit the vehicle’s existing standard wheels and tyres and shall not require changes to wheels, chassis, suspension or brakes.

The device shall have no moving parts and shall not affect acceleration, braking or fuel consumption in normal use.

Mass: the supplier shall state the mass per band for each wheel size.

Tyron reference: about 1 kg at 15 inch to 2 kg at 22.5 inch; Multiband HD under 2 kg.

Tyre pressure monitoring: where the vehicle has TPMS, a bracket or clearance for the wheel sensor shall be provided.

Identification (scored): each device should carry a means of confirming remotely that it is fitted after a tyre change.

Tyron reference: RFID fitted as standard on Multiband HD.

Service life: the device shall need no servicing and shall be removable and refittable at each tyre change for the life of the vehicle.

Refit tooling: a tyre fitter shall be able to remove and refit the device with a portable tool supplied with the vehicle set, without a hydraulic press. The supplier shall state the tool mass.

Tyron reference: portable fitting machine under 3 kg, kept with the vehicle.

With the bid, the supplier shall provide an independent test report or certificate for the device, showing the test body, vehicle, wheel and tyre size, load, speeds, distance and course, and whether the report covers the sizes offered.

Tyron reference: TÜV certificate and film for the handling test in 3.2.

The supplier shall provide evidence of use by comparable fleets: police, ambulance, fire or defence.

Tyron reference: approved by NATO, with NATO stock numbers for the ATR range and Multibands (supplied on request); used by the UK MoD; mandated for the riot vehicles of every UK police force; selected by UK constabularies for pursuit vehicles and protected carriers.

Acceptance test (recommended): before bulk fitting, the buyer may witness a controlled deflation test on one of its own vehicles fitted with the device. Results vary with speed, weight, tyre aspect ratio, tyre age and make, road conditions, cause of deflation, temperature and suspension, so a test on the buyer’s own vehicle is the best evidence.

UNECE Regulation 64 and Regulation 30, for the definition of run-flat tyres excluded from this lot.

The national tyre standards that apply to the tyres themselves (for Malaysia, the MS series).

Finabel 20.A.5, only where a quantified run-flat distance is demanded for armoured variants. See Part B.

The buyer may require a certified quality management system from the supplier; the supplier shall declare what it holds.

The supplier shall state the warranty term for the device in months and, where applicable, kilometres, and confirm that the warranty continues when the device is refitted at a tyre change by a trained fitter.

The supplier shall state its product liability insurance cover, insurer and territorial limits, and provide a certificate of insurance before contract award.

The supplier shall indemnify the buyer against third-party claims of infringement of patent or design rights arising from use of the device.

Tyron reference: Tyron is a registered trademark and its systems are patented in most countries.

The device shall be fittable and refittable by any competent tyre fitter, using the supplier’s fitting instructions and standard tyre-changing equipment. The supplier shall train [n] of the buyer’s workshop staff and issue fitting instructions in [languages].

A fitment record shall be kept per vehicle: registration, wheel size, band part number, date and fitter. A sticker or RFID record shall identify fitted vehicles.

Every wheel shall be refitted with the device at each tyre change. The supplier shall state the refit process and tooling for third-party tyre fitters.

Delivery within [x] days of order to [location], with vehicle sets packed and labelled per vehicle type.

With delivery the supplier shall hand over copies of test certificates, fitting instructions, the portable fitting tool per vehicle set where specified, and a certificate of conformity for the batch.

Clauses marked Mandatory are pass or fail. A bid that does not comply is not evaluated further.

Compliant bids are scored, for example technical and evidence 60%, price 30%, delivery and support 10%, or at the buyer’s own weighting.

Supply of run-flat inserts, beadlocks and, where specified, complete wheel, tyre and run-flat assemblies for the vehicle types in Schedule 1, with fitting, training and spares.

Wheel sizes 16 to 22.5 inch and 20-inch military sizes. The buyer lists sizes and tyre designations in Schedule 1.

Tyron reference: 20-inch runflats for 335/80R20 to 16R20; two-piece bolt-together wheels from 16 to 22.5 inch, 1,600 kg to 5,800 kg per wheel.

"Run-flat insert": a device mounted on the rim inside the tyre, filling part of the air cavity, on which the tyre runs when deflated.

"Beadlock": compression of the tyre beads against the wheel flanges by the insert or a separate ring, so the tyre cannot slip on the wheel at low or zero pressure.

"Multi-piece insert": an insert in segments that can be fitted and removed with standard workshop tools, without a hydraulic press.

"Penetration": tyre damage by ballistic attack or other rapid deflation.

"CTIS": central tyre inflation system.

On-road run-flat distance: with two tyres deflated, one steered and one driven, the vehicle at full load shall travel not less than 50 km on road, including 3 km at escape speed, 10 km at 50 km/h and the remainder at 25 km/h, without the tyre leaving the rim or catching fire and without serious loss of steering, stability or braking.

Tyron reference: ATR on the R7, 50 km at 50 km/h minimum on road. R4 with ATR, a guaranteed minimum of 50 km at 50 km/h with two or more tyres shot out. TÜV test of the 17-inch ATR on a Toyota Fortuner: 100 km at 50 km/h with two tyres deflated, then 50 km at 30 km/h with all four.

Scored: 75 km or 100 km on road to the Finabel A.20.A profile (3 km at escape speed, 22 km at 50 km/h, 75 km at 25 km/h).

Tyron reference: ATR-MP up to 150 km; ATR designed to keep moving for over 100 km.

Off-road: with two tyres deflated the vehicle shall operate for not less than two hours cross-country at about 20 km/h (Finabel 20.A.5) or about 30 km/h (Finabel A.20.A), negotiating gradients, steps, ditches and kerb strikes.

Tyron reference: R7 off-road, Finabel A.20.A for two hours minimum.

Bead retention: during the off-road test the tyre shall not rotate on the rim by more than one revolution, and shall not slip on inclines or when driven at reduced pressure. Proof marks shall be applied before the test.

Tyron reference: rubber beadlock with clamping force kept regardless of tyre make.

Maximum speed: the supplier shall state the maximum speed rating of the assembly inflated, and the escape speed deflated.

Ballistic: the insert and its fixings shall survive penetration of the tyre by 7.62 mm rounds in the Finabel pattern (five through the sidewall, two into the tread) without structural damage, and the vehicle shall then complete 3.1 or 3.2.

Tyron reference: 35 rounds of 7.62 mm, 20 through the sidewall and 15 into the tread, with direct hits on the fixings and no structural damage.

Material: the insert and beadlock shall be of a compliant rubber-type material that does not damage the tyre inner liner, body plies or bead at low pressure or off-road, in line with the tyre manufacturers’ technical bulletins.

Tolerance and sealing: the beadlock shall accommodate tyre bead and wheel tolerances while maintaining clamping force, and shall prevent sand and debris entering the tyre when flat.

Load: each wheel and insert shall carry the tyre’s maximum load. The supplier shall state the load rating per size.

Tyron reference: R4 1,600 kg; 18-inch R4 1,900 kg; R7 18 inch 1,850 kg and 17.5 inch 2,360 kg; standard ATR designed to carry the full capacity of the tyre.

Mass: the supplier shall state insert and wheel mass per size.

Tyron reference: 18-650ATR 19 ± 1 kg, 17.5-580ATR 20 ± 1 kg; R7 wheels 29 kg (18 inch) and 33 kg (17.5 inch); ATR-Carbon about 40% lighter than the metal-spine ATR-MP.

Field serviceability: tyres shall be changeable in the field with standard workshop tools, without a hydraulic press, and the insert shall be reusable.

CTIS and wheel compatibility: the system shall work with the vehicle’s existing wheels, tyres and CTIS where fitted. The Finabel trial is run without CTIS.

Wheels, where supplied: bolt-together or split-rim wheels shall be manufactured and tested to SAE J1992 as a minimum. The supplier shall state PCD, offset and centre bore.

Tyron reference: all Tyron wheels tested to a minimum of SAE J1992. R4 forged or cast aluminium; R6 three-piece steel split rim; R7 steel bolt-together.

Finabel test report: the supplier shall provide the report of a Finabel 20.A.5 or A.20.A trial on the offered size, stating test body, vehicle, load, tyres, circuit, speeds, distance, shooting pattern, tyre rotation on the rim and result.

Tyron reference: ATR independently tested by TÜV to exceed the Finabel standards; TÜV distance test on the 17-inch ATR.

Ballistic test report to 3.5.

Wheel test certificate to SAE J1992 or equivalent, to 3.12.

In-service evidence (scored): supply history with defence or security users.

Tyron reference: wheel, tyre and run-flat assemblies for the UK MoD Ridgback and Mastiff upgrade programme (ATR-MP with Michelin X Force ZL 16.00R20), second batch of 101 assemblies in 2022; PMETS programme assemblies.

Buyer acceptance trial: the buyer may run or witness a run-flat trial on its own vehicle before acceptance. The supplier shall support it.

Finabel Agreement 20.A.5 (1979), combat tyres, 50 km.

Finabel Agreement A.20.A (1997), pneumatic combat tyres, 100 km.

NATO STANAG 4825 / AEP-4825 Edition A (2021), procedure for the assessment of run-flat wheels for land vehicles. Restricted; cite by title. The assessment applies to the complete rim, insert and tyre combination.

SAE J2014, tyre, wheel and runflat assembly qualification for military tactical wheeled vehicles; SAE J1992, wheel testing.

EN 1522 / EN 1063 or VPAM BRV for the vehicle armour level, where the run-flat is part of an armouring package.

Tyre manufacturers’ technical bulletins on compliant run-flat and beadlock materials (Michelin, Bridgestone and Goodyear, 2010).

Warranty term for inserts, beadlocks and wheels in months and kilometres, including refitted inserts, and on any repaired assemblies.

Product liability insurance: the supplier shall state the cover and provide a certificate before award.

Patent indemnity as in Part A, 7.3.

Liquidated damages for late delivery and performance security, at the buyer’s standard rates.

Workshop-based training for the buyer’s fitters in fitting, removal and tyre change with standard tools.

Fitting lubricant and fitting instructions supplied with each set.

Fitment record per vehicle and wheel position, with insert part number and batch.

Delivery time, packaging to the buyer’s packaging level, marking, and a spares list.

Certificate of conformance per batch with test results, copies of the reports in 4.1 to 4.3, and the fitting manual.

Option: complete assembled wheel, tyre and run-flat sets, inflated, with a named tyre brand.

Tyron reference: assembly service with Michelin, Continental and Pirelli tyres, in partnership with Global Wheels.

Stage 1: pass or fail on Mandatory clauses and on the test reports in 4.1 to 4.3.

Stage 2: weighted scoring, for example run-flat performance beyond the minimum (3.1a) 20%, field serviceability and logistics 15%, mass 10%, in-service evidence 10%, price 35%, delivery and support 10%.