Different clubs had different standards and did not always recognise the same world records until 1924, when the Association Internationale des Automobile Clubs Reconnus ( AIACR ) introduced new regulations: two passes in opposite directions ( to negate the effects of wind ) averaged with a maximum of 30 minutes ( later more ) between runs, average gradient of the racing surface not more than 1 percent, timing gear accurate within 0. 01sec, and cars must be wheel-driven.

Different sampling ratios were applied under different conditions.

Different individuals or nations may have different real opportunity costs of production, say from differences in stocks of human capital per worker or capital / labour ratios.

Different minerals in a given geologic setting can acquire distinctly different ratios of radiogenic strontium-87 to naturally occurring strontium-86 (< sup > 87 </ sup > Sr /< sup > 86 </ sup > Sr ) through time ; and their age can be calculated by measuring the < sup > 87 </ sup > Sr /< sup > 86 </ sup > Sr in a mass spectrometer, knowing the amount of < sup > 87 </ sup > Sr present when the rock or mineral formed, and calculating the amount of < sup > 87 </ sup > Rb from a measurement of the Rb present and knowledge of the < sup > 85 </ sup > Rb /< sup > 87 </ sup > Rb weight ratio.

Different codecs will use different chroma subsampling ratios as appropriate to their compression needs.

Different ratios provide different aesthetic effects.

Different rotor shapes and rotor / stator pitch ratios exist, but are specialized in that they don't generally allow complete sealing, so reducing low speed pressure and flow rate linearity, but improving actual flow rates, for a given pump size, and / or the pump's solids handling ability.

Different types of Synroc waste forms ( ratios of component minerals, specific HIP pressures and temperatures etc.

Different degrees or ratios of anisotropic filtering can be applied during rendering and current hardware rendering implementations set an upper bound on this ratio.

Different lenses are used for different aspect ratios.

Different types of gears have different ratios of rotation of the motor and the wheel, and they include " 3. 5: 1 ", " 4: 1 ", " 4. 2: 1 ", " 5: 1 ", and " 6. 4: 1 ".

Different ratios of the target language to the native language may occur.

Different manufacturers choose slightly different ratios to fine-tune operating characteristics in context of anticipated application requirements.

Different damping ratios produce different SRSs for the same shock waveform.

See for example gear ratios.

Modern on-highway diesel engines are designed to provide maximum torque in a narrow RPM range ( usually 1200-1500 RPM ); having more gear ratios means the driver can hold the engine in its optimum range regardless of road speed ( drive axle ratio is also a critical factor ).

A torque multiplier is a gear box with reduction ratios greater than 1.

The gear ratio in bait casting reels was initially about 3 / 1, later standardized at 4 / 1 in most reels, but recent developments have seen many bait casting reels with gear ratios as high as 5. 5 / 1 or even 7. 1 / 1.

Higher gear ratios allow much faster retrieval of line, but sacrifice some amount of power in exchange.

In transmissions which offer multiple gear ratios, such as bicycles and cars, the term gear, as in first gear, refers to a gear ratio rather than an actual physical gear.

Bechia persuaded him that the 4th gear was actually an overdrive, this is why on the early cars the gear change was marked " S " for " surmultiplié " The increased number of gear ratios also helped with the performance penalty caused by the extra weight of switching from light alloys to steel for the body and chassis.

Its low speed torque and gear ratios were ideally suited to the hills about Bradford and Yorkshire's terrain where poor roads provided little use for a high top speed or quick acceleration.

They have several gear ratios, typically three to six, sometimes multiplied into two or three ranges.

Either a synchronized manual transmission with enough available gear ratios ( often achieved with dual ranges, high and low ) or a CVT allow the engine speed to be matched to the desired final-drive speed, while keeping engine speed within the appropriate speed ( as measured in rotations per minute or rpm ) range for power generation ( the working range ) ( whereas throttling back to achieve the desired final-drive speed is a trade-off that leaves the working range ).

The high-wheeler lives on in the gear inch units used by cyclists in English-speaking countries to describe gear ratios.

For more information about the choice of particular gear ratios and sprocket sizes, see Bicycle gearing.

Modern developments with up to 14 gear ratios are available.

* Hub gears can change gear ratios when the rear wheel is not rotating.

* Hub gears can be simpler to use for inexperienced riders, because there is generally only a single shifter to operate and there are no overlapping gear ratios.

* Hub gears provide a means for shifting gear ratios on drivetrains incompatible with external deraileurs such as belt drives and shaft drives.

Careful sprocket selection can allow the available gear ratios when using one sprocket to fall half-way between those available when using the second sprocket, providing half-step gearing, as on the Brompton 6-speed folding bicycle.