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4" Carbon Fiber Digital Caliper

4" Carbon Fiber Digital Caliper

Item # PTW80157
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PTW80157 - Digital Caliper Performance Tool Tools
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Lowest Prices for the best tools from Performance Tool. 4" Carbon Fiber Digital Caliper part number PTW80157 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (7)
  • Q & A (754)
  • Videos (1)
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  • Why etrailer?

Performance Tool Tools - PTW80157

  • Measuring Devices
  • Digital Caliper
  • Performance Tool


  • Performance Tool 4" Carbon Fiber Digital Caliper collects accurate measurements on just about anything from projects around the home or office, to automotive repairs, carpentry or laboratory applications
  • Measures outside and inside dimensions
  • Accurate to plus/minus 0.01" or 0.2mm
  • Large easy to read LCD display
  • Lightweight and durable
  • Zero setting at any position within measuring range
  • SAE to metric conversion


  • Material: Durable and lightweight carbon fiber
  • LCD display
  • Measures 0" to 4" SAE by 0.01" increments and 0mm to 100mm metric range by 0.1mm increments
  • Includes 1 LR44 battery necessary for operation

W80157 4" Carbon Fiber Digital Caliper

W80157 4" Carbon Fiber Digital Caliper

California residents: click here

Video of 4" Carbon Fiber Digital Caliper

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Performance Tool Carbon Fiber Digital Caliper Review

Today we'll be looking at the Performance Tool four inch carbon fiber digital caliper. Part number PTW80157. This allows you to read from 0 to 4 inches or 0 to 100 millimeters. It moves in 100ths of an inch or 1/10ths of a millimeter. It has a nice LED screen. You hit the on button and it's easy to read.

You can switch between millimeters and inches. Right now it's in inches and now it's in millimeters. Just by the touch of a button. We also have our zero capability so when we move it down our measurement tool, if we want to measure something and see the difference between another measurement, we can hit the zero button and it shows us the difference. This is a negative distance or a positive distance.

Take it back to zero and hit the zero button again so we can start back from zero inches or zero millimeters. This allows us to measure the outside diameter or the inside dimensions with the other side. Now we can show you in action. On our trailer here, we pulled off our seal. Usually it's stamped with the measurements on it, but this one has worn off over time. WE can use our tool to find the inner dimension of our race.

2.18 inches. If we need to figure out the outside diameter, that'll be 3.35 inches. Other measurements that we might need to know. Come to our shaft. We've got the bearings that sit on our shaft so we might need to know the diameter of our shaft.

We can come up, be 1.24 inches and that'll be for our inner or our outside bearing. If we need to figure out our other, the larger bearing, the inside bearing, we do the same thing. 1.74 inches. Now if we need to know the difference between the two, we come up we get the inside bearing, we hit our zero button, that zeros it out, and we can come to our outside bearing and we see there's almost a half inch difference between the two bearing sizes. Same works if you want to figure out the dimensions here for our race because that's where it sits. This is where our race sits. If I want to do difference in that. I'll take our meter, I'll measure the inside diameter of our race, I'll hit the zero button, and then I can come and measure the outside distance of our race and see if there's any difference at all. Which, there's not, but if there was it would show us. There would be a negative difference or if I measure something bigger, it would show us a positive difference. That's it for a look at the Performance Tool 4 inch carbon fiber digital caliper. Part number PTW80157.Speaker 2: You can find this and everything else right here at etrailer.com What's up man.

Customer Reviews

4" Carbon Fiber Digital Caliper - PTW80157

Average Customer Rating:  5.0 out of 5 stars   (7 Customer Reviews)

- PTW80157

It works great and it's just plain fun. I bought it to measure bearing buddies and spindles. It works for that but it also has been great for measuring the diameter of carbon fiber tubes I'm using to build a sailboat mast and spars. It gives instant metric to inch conversions - just push the in/mm button and the measurement in the display converts. I've used it at least a couple of hundred times and it's still on the original battery. Pro tip: Close it all the way before you turn it on. 831574

- PTW80157

Thanks so much for this page especially the links the videos. You all are the best, 804914

- PTW80157

Everything works, all parts needed were there, and the instructional videos were exactly what was needed for a first-timer! 688242

- PTW80157

All three items received in good condition and fast. 681735

- PTW80157

Excellent tool for the money not sure how long it will last, but it does work. 513403

- PTW80157

I have always wanted a digital caliper now I have one. I have always relied on my older read out types since this is the one etrailer uses I will be able to take the same measurements they do . My local bearing supplier has priced themselves out of the market so I use etrailer ! 376432

- PTW80157

A very nice useful tool. First one I got had a malfunction and the company sent me another one right away 362459

Great tool. Use it all of the time
Larry J - 04/04/2018


Ask the Experts about this Performance Tool Tools

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    I would love to help but in order to make sure we get the exact wheel stud you need for your 2013 Ice Castle Trailer we are going to need a bit more precise measurements. In order to find these precise measurements you will need a digital caliper like part # PTW80157. I have attached a photo of the measurements I will need to make sure you get the correct replacement wheel stud. Judging from the photo you have attached it should be either part # 7-223 for 9/16" diameter or part # K12WB2...
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    I am not aware of any way to determine the correct size grease cap save for measuring the opening on the hub with a digital caliper like part # PTW80157. There is no cross reference chart based off of the bearings to my knowledge. The next size up we have from 1.98". is part # TRDC-233 which measures 2.33". I have attached a list of our options for you as well.
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    The correct tool to use for measuring the pilot hole opening of a trailer hub is a digital caliper like part # PTW80157 to the nearest thousandth. However, based on the 2-1/4" measurement you provided you will want to use the Bearing Buddy Bearing Protectors part # BB2240SS for stainless or part # BB2240 for chrome. The stainless will resist corrosion better than the chrome. I have attached a review video of both options for you.
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  • Replacement Grease Seal for AF3531G
    I did a bit of searching online and called a few grease seal manufacturers but was not able to reference "AF3531G" to any particular product. Therefore, the only way you are going to be able to find the correct replacement would involve measuring the inner and outer diameter using a digital caliper like part # PTW80157. If the inner diameter measures 2.25" and the outer diameter measures 3.376" then part # XLPROLUBE2440SEAL would be correct for you. If you have different measurements...
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  • Replacement Seals For A 1998 Triton Boat Trailer
    Based on the measurements you provided the Grease Seal # 010-180-00 is the closest match we have for you in our inventory. We do not carry and did not see the part number referenced KOK 2611 in searches. To be sure you can always revisit your spindle measurements. When you remove one of your hubs, you will find an outer bearing, an inner bearing, and a grease or oil seal. There are numbers printed on the face of each one. If they are legible, let me know those numbers and we can get...
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  • How To Determine The Correct Hub/Drum Assembly Based on Spindle Size
    To determine your spindle size, you can either pull one hub off your trailer and look at the bearing numbers on the face of the inner and the outer bearing, or you can measure the spindle itself. I've attached an article and a photo to assist. If you measure the spindle, you will want to use a digital caliper like # PTW80157 because the precise measurement in the locations where the bearings sit and where the seal sits will determine the correct spindle size. Once you have the...
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  • Grease Caps and Light Parts for 2004 Mac-Lander 16T FSWS Utility Trailer
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  • How To Find The Correct Replacement Hub Components For Easyline 105 Trailer
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  • Replacement Dust Cap For Haul Master utility trailer model 90154
    I am happy to help you figure out which dust cap you need for the Haul Master utility trailer model 90154 however, I was not able to find any information about the wheels on your utility trailer. To get the correct sized dust cap you can simply measure the inner pilot hole diameter of your wheel (where the cap goes). You may find it helpful to use a digital caliper like part # PTW80157 to get the measurement as accurate as possible. For example: the diameter of the grease cap part # RG04-020...
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  • How to Locate Replacement Bearings for Dexter Axle
    I spoke with my contact at Dexter regarding your model 3K7258 axle that you referenced in your question. He was unable to pull up any specific bearing information using this model number. If you can locate the axle serial number, which should be printed on a sticker somewhere on the axle itself, this might be more helpful in determining the correct bearing kit. Otherwise, the easiest way to determine what bearings you need is to simply pull off the hubs and check for the numbers that...
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  • Replacement Bearings And Seal For 1998 Triton Trailer WCII
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    I can help you get the correct replacement, but I need some information from you to ensure we get you the correct hub. If you remove a hub and can give me the bearing number on the face of the inner and the outer bearing as well as the number on the seal, then I can get you the correct fit. The bearing numbers are etched into the face of each bearing as well as the metal ring on the seal. If you don't have these, then you will need to use a digital caliper like # PTW80157 to...
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    Thank you for the grease seal part numbers you provided. I was not able to find a seal cross reference for these so to select replacements your best bet is to measure your spindle diameters and hub bores to get the required inner and outer seal diameters. Use a precision digital caliper like # PTW80157. Then use the linked page and simply click on the filters for your inner and outer seal diameters to see the options in that size. You can also click on your preference for single- or...
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Info for this part was:

Expert Research:
Mike L
Expert Research:
Jameson C
Expert Research:
Adam R
Expert Research:
Jeffrey L
Video Edited:
Joshua S
Video Edited:
Jacob T
Video by:
Dustin K
Installed by:
Jared G
Installed by:
Matthew S
Written by:
Jacob W
Updated by:
Erin H

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