Gear ratio check

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 ==Overview==
 Methods to determine the gear ratio of the differential
+I just wanted to drop these links in somewhere they would be useful....
+http://www.quadratec.com/jeep_knowledgebase/article-26.htm
+http://www.alloyusa.com/gear-ratio-calculator/
 ==Codes==
@@ Line 45: / Line 49: @@
 ==Other methods==
-{{Note1}}The following methods require the drive tire diameter to be known. There are various places online that can estimate the tire diameter from the tire's size.
+{{Note1}}The following methods require the drive tire diameter to be known. A table with some common tire sizes and diameters can be seen [[Gear ratio check#Tire size table|'''below''']]. There are also various places online that can estimate the tire diameter from the tire's size.
-Or, the tire can be measured by running a string around the tire and measuring its length, or marking the sidewall and floor, then move the car ahead one revolution and mark the ground a second time. Then simply measure the distance between the marks for the circumference. A [http://math.about.com/library/blcirclecalculator.htm calculator] can give a quick answer for the diameter. To find the diameter from the circumference long hand, use the formula: '''D equals C divided by Pi''', where '''D''' = diameter, '''C''' = circumference and '''Pi''' = 3.1416.
+Or, the tire can be measured by running a string around the tire and measuring its length, or marking the sidewall and floor, then move the car ahead one revolution and mark the ground a second time. Then simply measure the distance between the marks for the circumference. A  can give a quick answer for the diameter. To find the diameter from the circumference long hand, use the formula: '''D equals C divided by Pi''', where '''D''' = diameter, '''C''' = circumference and '''Pi''' = 3.1416.
-A table with some common tire sizes and diameters can be seen below.
 ===First method:===
@@ Line 72: / Line 74: @@
 ==Tire size table==
+Return to [[Gear ratio check#Other methods|'''above''']].
 <table class="techrows" style="font-size:10px" border="1" cellpadding="2" cellspacing="0" width="760"><tr valign="middle"><th class="titleb" rowspan="2">Approx. Tire Diameter<br>(in Inches)</th><th class="titlec" colspan="4" width="412"><strong>P-Metric and European Metric</strong></th><th class="titlec" colspan="4" width="412"><strong>LT-Metric</strong></th><th class="titled" colspan="2"><strong>Light Truck</strong></th></tr><tr valign="middle"><th class="titleb">82-series and 80-series</th><th class="titleb">75-series and 70-series</th><th class="titleb">65-series and 60-series</th><th class="titleb">55-series and lower<br></th><th class="titleb">85-series and 80-series</th><th class="titleb">75-series and 70-series</th><th class="titleb">65-series and 60-series</th><th class="titleb">55-series and lower<br></th><th class="titleb">Flotation</th><th class="title" style="font-size:10px">Numeric</th></tr><tr><td><strong>42</strong></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>42x14.50R17LT</td><td><br></td></tr><tr class="grey"><td rowspan="3" width="103"><strong>40</strong></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>40x13.50R20LT</td><td><br></td></tr><tr class="grey"><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>40x13.50R18LT</td><td><br></td></tr><tr class="grey"><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>40x13.50R17LT</td><td><br></td></tr><tr><td><strong>38-1/2</strong></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>38.5x14.50R20LT</td><td><br></td></tr><tr class="grey"><td rowspan="4" width="103"><strong>38</strong></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT395/70R16</td><td>LT395/65R18</td><td><br></td><td>38x14.00R24LT</td><td><br></td></tr><tr class="grey"><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>38x15.50R20LT</td><td><br></td></tr><tr class="grey"><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>38x15.50R18LT</td><td><br></td></tr><tr class="grey"><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>38x15.50R15LT</td><td><br></td></tr><tr><td rowspan="6" width="103"><strong>37</strong></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT325/80R16</td><td><br></td><td><br></td><td><br></td><td>37x14.00R24LT</td><td><br></td></tr><tr><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>37x13.50R22LT</td><td><br></td></tr><tr><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>37x13.50R20LT</td><td><br></td></tr><tr><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>37x13.50R18LT</td><td><br></td></tr><tr><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>37x13.50R17LT</td><td><br></td></tr><tr><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>37x12.50R17LT</td><td><br></td></tr><tr class="grey"><td rowspan="2" width="103"><strong>36</strong></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT375/60R18</td><td><br></td><td>36x15.50R20LT</td><td><br></td></tr><tr class="grey"><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>36x15.50R15LT</td><td><br></td></tr><tr><td rowspan="2" width="103"><strong>35</strong></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT305/70R18</td><td>LT285/65R20</td><td><br></td><td>35x13.50R20LT</td><td><br></td></tr><tr><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT285/75R18</td><td>LT325/65R18</td><td><br></td><td><br></td><td><br></td></tr><tr class="grey"><td rowspan="4" width="103"><strong>34-1/2</strong></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT315/70R17</td><td>LT275/65R20</td><td><br></td><td>35X12.50R20LT</td><td><br></td></tr><tr class="grey"><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT315/75R16</td><td><br></td><td><br></td><td>35x12.50R18LT</td><td><br></td></tr><tr class="grey"><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>35x12.50R17LT</td><td><br></td></tr><tr class="grey"><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>35X12.50R15LT</td><td><br></td></tr><tr><td><strong>34</strong></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT305/70R17</td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr class="grey"><td><strong>33-1/2</strong></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT255/85R16</td><td>LT275/70R18</td><td>LT285/60R20</td><td>LT305/55R20</td><td><br></td><td><br></td></tr><tr><td rowspan="4" width="103"><strong>33</strong></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT285/70R17</td><td>LT325/60R18</td><td>LT325/50R20</td><td>33x12.50R20LT</td><td><br></td></tr><tr><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT305/70R16</td><td>LT305/65R17</td><td>LT375/50R18</td><td>33x12.50R18LT</td><td><br></td></tr><tr><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT285/75R16</td><td>LT295/65R18</td><td>LT375/55R16</td><td>33x12.50R17LT</td><td><br></td></tr><tr><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>33x15.50R15LT</td><td><br></td></tr><tr class="grey"><td rowspan="3" width="103"><strong>32-1/2</strong></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT275/70R17</td><td>LT305/60R18</td><td>LT375/55R16</td><td>33X12.50R16.5LT</td><td><br></td></tr><tr class="grey"><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT255/75R17</td><td>LT275/65R18</td><td><br></td><td><br></td><td><br></td></tr><tr class="grey"><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT315/70R15</td><td><br></td><td><br></td><td>33X12.50R15LT</td><td><br></td></tr><tr><td rowspan="3" width="103"><strong>32</strong></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT265/70R17</td><td><br></td><td>LT345/55R17</td><td><br></td><td><br></td></tr><tr><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT245/75R17</td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT265/75R16</td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr class="grey"><td rowspan="2" width="103"><strong>31-1/2</strong></td><td><br></td><td>265/70R17</td><td>285/60R18</td><td><br></td><td>LT235/85R16</td><td>LT265/75R16</td><td><br></td><td><br></td><td>32X11.50R15LT</td><td>7.50R16LT</td></tr><tr class="grey"><td><br></td><td>265/75R16</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr><td rowspan="2" width="103"><strong>31</strong></td><td><br></td><td>275/70R16</td><td><br></td><td>285/55R18</td><td>LT215/85R16</td><td>LT245/70R17</td><td><br></td><td>LT345/55R16</td><td><br></td><td><br></td></tr><tr><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>LT245/75R16</td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr class="grey"><td rowspan="3" width="103"><strong>30-1/2</strong></td><td><br></td><td>265/70R16</td><td>285/60R17</td><td><br></td><td><br></td><td>LT285/70R15</td><td>LT325/60R15</td><td><br></td><td>31X10.50R16.5LT</td><td>9.50R16.5LT</td></tr><tr class="grey"><td><br></td><td>265/75R15</td><td>265/65R17</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>31X11.50R15LT</td><td><br></td></tr><tr class="grey"><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>31X10.50R15LT</td><td><br></td></tr><tr><td rowspan="2" width="103"><strong>30</strong></td><td><br></td><td>255/70R16</td><td>275/60R17</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr><td><br></td><td><br></td><td>255/65R17</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr class="grey"><td rowspan="2" width="103"><strong>29-1/2</strong></td><td><br></td><td>245/70R16</td><td>265/60R17</td><td><br></td><td><br></td><td>LT225/75R16</td><td>LT285/60R16</td><td>LT315/55R16</td><td>30X9.50R15LT</td><td>8.75R16.5LT</td></tr><tr class="grey"><td><br></td><td>265/70R15</td><td>245/65R17</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td>7.00R15LT</td></tr><tr><td rowspan="3" width="103"><strong>29</strong></td><td>205R16</td><td>235/70R16</td><td>255/60R17</td><td>255/55R18</td><td><br></td><td>LT235/75R15</td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr><td>205/80R16</td><td>255/70R15</td><td>255/65R16</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr><td><br></td><td>235/75R15</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr class="grey"><td rowspan="3" width="103"><strong>28-1/2</strong></td><td><br></td><td>225/70R16</td><td><br></td><td><br></td><td><br></td><td>LT225/75R15</td><td><br></td><td><br></td><td>29X9.50R15LT</td><td>8.00R16.5LT</td></tr><tr class="grey"><td><br></td><td>245/70R15</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr class="grey"><td><br></td><td>225/75R15</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr><td><strong>28</strong></td><td><br>215/70R16</td><td>275/60R15</td><td>255/55R17</td><td><br></td><td><br></td><td>LT245/65R15</td><td><br></td><td><br></td><td><br></td></tr><tr class="grey"><td rowspan="2" width="103"><strong>27-1/2</strong></td><td><br></td><td>225/70R15</td><td><br></td><td><br></td><td><br></td><td>LT215/75R15</td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr class="grey"><td><br></td><td>215/75R15</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr><td rowspan="3" width="103"><strong>27</strong></td><td><br></td><td>205/75R15</td><td>255/60R15</td><td>255/50R17</td><td><br></td><td>LT205/75R15</td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr><td><br></td><td><br></td><td>225/60R16</td><td>305/50R15</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr><td><br></td><td><br></td><td>215/65R16</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr class="grey"><td rowspan="2" width="103"><strong>26-1/2</strong></td><td><br></td> <td class="dark">225/70R14</td><td>245/60R15</td><td>295/50R15</td><td><br></td><td>LT195/75R15</td><td><br></td><td><br></td><td>27X8.50R14LT</td><td><br></td></tr><tr class="grey"><td><br></td><td>195/75R15</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr><td rowspan="3" width="103"><strong>26</strong></td><td>185R14</td><td>195/70R15</td><td>235/60R15</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr><td><br></td><td>215/70R14</td><td>215/65R15</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr><td><br></td><td>205/75R14</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr class="grey"><td rowspan="2" width="103"><strong>25-1/2</strong></td><td><br></td><td>205/70R14</td><td>225/60R15</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr><tr class="grey"><td><br></td><td>195/75R14</td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td><td><br></td></tr></table>
 ==Resources==
@@ Line 78: / Line 82: @@
 [[Category:Identification and decoding]]
 [[Category:Rearend]]
-[[Category:Good articles]]

Gear ratio check

Latest revision as of 17:42, 8 December 2023

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