Milan Posted February 23, 2015 Posted February 23, 2015 (edited) EDIT: Totally forgot to finish writing title....sorry. What is the difference between these two tires: 1. Black Tire 94.2mm D. x 22mm Motorcycle Racing Tread (http://www.bricklink...tem.asp?P=88516) and, 2. Tire Technic Street Bike (8420) - Narrow, Front (http://www.bricklink...tem.asp?P=51380) I am primarily interested in diameter difference, if the is any. I tried to count studs on pictures, but not very accurate, tried in Mlcad, but there isn't both type of tires, tried wheel charts, not both types... It looks like latter tire is full rubber, so I guess wheels are not interchangeable. Thanks in advance! Edited February 23, 2015 by Milan Quote
DrJB Posted February 23, 2015 Posted February 23, 2015 (edited) I only have the recent wheels/tires and the old are rather rare (8420). That said, one option would be to compare both parts within LDraw. Edited February 23, 2015 by DrJB Quote
Milan Posted February 23, 2015 Author Posted February 23, 2015 I tried to compare them in mlcad, but there are not both types of them. Quote
Jim Posted February 23, 2015 Posted February 23, 2015 Additional Notes: 93.2mm diameter tire / 20.8mm width tire / 75.3mm diameter rim Tire 94.2mm D. x 22mm Motorcycle Racing Tread Part 88517 Wheel 75mm D. x 17mm Motorcycle 75.3 vs 75mm Let me check in LDraw.... I tried to compare them in mlcad, but there are not both types of them. In LDraw neither. (but maybe that logical, since they aren't both in MLCad) Quote
Milan Posted February 23, 2015 Author Posted February 23, 2015 Additional Notes: 93.2mm diameter tire / 20.8mm width tire / 75.3mm diameter rim Tire 94.2mm D. x 22mm Motorcycle Racing Tread Ahh, info was there all along, thanks Jim! so they are not same diameter...93.2mm - 94.2mm I guess tread pattern is not same, either? Quote
Musikfreak Posted February 23, 2015 Posted February 23, 2015 (edited) I just measured them roughly with a tape measure: the one from 42036: ~94mm the one from 8420: ~91mm What one has to keep in mind is that the inset from the 8420 wheel is asymmetric and the axle hole is not in the middle of the wheels width (which is 20mm for both btw.) Hope this helps. edit: ah it already shows how crude the measurement was. but my 8420 is def. smaller than 93mm. The whole wheel concept is different. The new one actually has air inside while the old one is a massive piece of soft plastic with a flat inside surface. Edited February 23, 2015 by Musikfreak Quote
Milan Posted February 23, 2015 Author Posted February 23, 2015 I just measured them roughly with a tape measure: the one from 42036: ~94mm the one from 8420: ~91mm What one has to keep in mind is that the inset from the 8420 wheel is asymmetric and the axle hole is not in the middle of the wheels width (which is 20mm for both btw.) Hope this helps. edit: ah it already shows how crude the measurement was. but my 8420 is def. smaller than 93mm. The whole wheel concept is different. The new one actually has air inside while the old one is a massive piece of soft plastic with a flat inside surface. Yes, it helps! Thanks! So treads patterns are different too? Quote
Musikfreak Posted February 23, 2015 Posted February 23, 2015 Well the basic pattern is actually the same. Meaning the shape, orientation and layout of the grooves is the same. The absolute size however is different. The 8420 grooves are quite a bit narrower. Could be due to the different manufacturing process of the different wheel types. Also the 8420 wheel has (what i presume to be) production marks from the molding process on the outside on one side so every third groove is crude and big (can be seen very clearly in the left picture above as well). Quote
Sariel Posted February 23, 2015 Posted February 23, 2015 Be advised that with the old wheel, the tire is practically impossible to remove once in place. Quote
Jim Posted February 23, 2015 Posted February 23, 2015 Be advised that with the old wheel, the tire is practically impossible to remove once in place. So it's not me. I stopped trying and ordered some on Bricklink Quote
darsedz Posted February 23, 2015 Posted February 23, 2015 Some info about old type wheels can you find on Series Wheels database http://wheels.sariel.pl/ Quote
Cumulonimbus Posted February 24, 2015 Posted February 24, 2015 One of my 8420 bikes has flattened patches on the tires, which I find supprising because the rubber compound is quite hard. I guess that storing the tires under load, for example in a displayed model, could lead to this effect. Does anybody else have had this issue with these (or other) tires? Quote
Freekysch Posted February 24, 2015 Posted February 24, 2015 One of my 8420 bikes has flattened patches on the tires, which I find supprising because the rubber compound is quite hard. I guess that storing the tires under load, for example in a displayed model, could lead to this effect. Does anybody else have had this issue with these (or other) tires? Looking at all my display models non of them have this problem. Quote
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