Lab Update #92: Steel rims vs alloy rims
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- I installed the shiny alloys from my wifes car on Touran and then reckoned that increased consumption. To verify that I went on some rather lengthy test drive.
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I've often heard that bigger Alloys will increase consumption over smaller trim covered wheels but wasn't sure whether to believe it or not. Thanks for taking one for the team to confirm any difference is more likely to be tyre width, compound and pressure related.
Maybe for longer motorway journeys at high speed it might make a small difference.
usually people think that because they compare a light smaller wheel to a much bigger wheel with much larger tire but maintaining the overall diameter for the same km/h. For example my little mk1 golf from 155/80R13 to 195/50R15, a upgrade that will give you stability/traction/adherence but will consume much more fuel.
As a former chassis designer, I know that tires should be the narrowest model with hard rubber (hige treadwear ratings), wearn out almost illegal, max air pressure, for minimum "gasoline consumption" as it was at that time. The car should preferably also be lowered with the least possible ground clearance and all gaps in the bodywork should be taped , the windscreen wipers removed or stored straight up in the direction of the air stream. The measuring road must be completely even with smooth asphalt. Trick that manufacturers still use today when measuring consumption.
For me inflating the tires makes a big difference.
Inflation and width of the tyre might be the most important Parameter in the Autobahn.
Hard and narrow are better.
Another video coming ;)
super video
How about doing a drive with different tire pressures? That should yield more of a difference.
May do that on a smaller test loop though
Warum testet sowas eigentlich niemand mit Ausrollversuchen? Z. B. von 120 km/h auf 80 km/h in Neutral bzw. Leerlauf. Damit wären solche Tests zur Aerodynamik doch viel schneller erledigt.
Guter Punkt. Ich würde sagen die Anforderungen an die Messtechnik sind höher aber es würde trotzdem schneller gehen
Why did you get different distance readings if you did the exact same route? Is it because maybe the overall diameter is different? What are the tire sizes? if so then maybe you must take that in account also.
Yes, see 6:00
@@EngineersFear Ooops! Sorry...