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  1. Trailer Hubs and Drums
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  3. 5 on 4-1/2 Inch
  4. For 2500 lbs Axles
  5. Hub
  6. 8 Inch Wheel
  7. 10 Inch Wheel
  8. 12 Inch Wheel
Trailer Idler Hub Assembly for 2,500-lb Axles - 5 on 4-1/2 - Qty 2

Trailer Idler Hub Assembly for 2,500-lb Axles - 5 on 4-1/2 - Qty 2

Item # TA88545-2
Our Price: $93.74
Trailer Hubs and Drums
Orders above $99 qualify for Free Shipping
Shipping Weight: 15 lbs
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Hubs are designed for use on trailer idler axles. Fits 2,500-lb axles. Inner bearings and races, outer bearings and race, grease seals, grease caps, and lug nuts included. Great Prices for the best trailer hubs and drums from Timbren. Trailer Idler Hub Assembly for 2,500-lb Axles - 5 on 4-1/2 - Qty 2 part number TA88545-2 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (16)
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Timbren Trailer Hubs and Drums - TA88545-2

  • 5 on 4-1/2 Inch
  • For 2500 lbs Axles
  • Hub
  • 8 Inch Wheel
  • 10 Inch Wheel
  • 12 Inch Wheel
  • Standard
  • 1/2 Inch Stud
  • L44649
  • L44649
  • Timbren

Hubs are designed for use on trailer idler axles. Fits 2,500-lb axles. Inner bearings and races, outer bearings and race, grease seals, grease caps, and lug nuts included.


  • Trailer hub assembly fits idler axles
    • Bearings, races, seal, grease cap, and lug nuts are included
  • Sturdy steel construction


  • Application: 2,500-lb trailer axles
  • Bolt size: 5 on 4-1/2"
  • Wheel stud diameter: 1/2"
  • Weight capacity: 1,250 lbs per hub

Bearing, Race, and Seal Information

  • Bearings (included)
    • Inner/outer bearing: L44649
  • Races (included)
    • Inner/outer race: L44610
  • Grease seal (included): 10-60
    • Inner diameter: 1.50"
    • Outer diameter: 1.987"

Determining the Bolt Pattern

The first number in the bolt pattern is the number of bolt holes. The second number denotes the diameter, in inches, of the circle on which the bolt holes sit.

Bolt Pattern - Even

On wheels with an even number of bolt holes, measure from the center of one bolt hole to the center of the hole directly across from it. (Example: 8 on 6-1/2 means 8 bolt holes with 6-1/2" from the center of one hole to the center of another on the opposite side.)

Bolt Pattern - Odd

To determine the bolt-circle diameter on wheels with an odd number of bolt holes, measure from the center of any bolt hole to the point halfway between the two bolt holes directly across from the first. (Example: 5 on 4-1/2 means 5 bolt holes with 4-1/2" measured to a point halfway between the opposite bolt holes.)

Bolt Pattern - Side

Measuring the distance (D) from the center of one bolt hole on the wheel to the center of a bolt hole right next to it can also help to determine the bolt pattern.

  • If D = 2-5/8", then the bolt pattern is 5 on 4-1/2"
  • If D = 2-3/4", then the bolt pattern is 5 on 4-3/4"
  • If D = 3", then the bolt pattern is 5 on 5"
  • If D = 3-1/4", then the bolt pattern is 5 on 5-1/2"

88545_2 Trailer Idler Hub Assembly for 2,500-lb Axles - 5 on 4-1/2 - Qty 2

Replaces 88545-2

Customer Satisfaction Score:

Customer Reviews

Trailer Idler Hub Assembly for 2,500-lb Axles - 5 on 4-1/2 - Qty 2 - TA88545-2

Average Customer Rating:  4.8 out of 5 stars   (16 Customer Reviews)

Hubs are designed for use on trailer idler axles. Fits 2,500-lb axles. Inner bearings and races, outer bearings and race, grease seals, grease caps, and lug nuts included.


I purchased this idler hub assembly to replace the 27 year old hardware on my 1991 Coleman Fleetwood Sun Valley. I’ve never dealt with these types of products so I turned to etrailer since they literally have all the answers. After disassembling my hub I located my inner and outer bearings and called Greg at etrailer with the bearing numbers. He verified this was the right setup for me and that it would fit with my axle. The price was amazing for all of these items, especially when comparing to some of the $60 local quotes I got for bearings alone. I ordered this set and paid $18/19 shipping. I should have ordered a second set of grease seals for next time but I forgot. Anyways, the shipping (UPS) was delayed which was upsetting. When I got the package I was a little disappointed that it was basically just a bunch of parts tossed in a box. The bearings were 4 bearings in a sandwich bag, and all the other hardware was in a separate bag which somehow was torn and parts were scattered in the box. I guess when you buy this “set” someone from the warehouse just gathers the parts and puts them in a box? Also, there was no cotter pin or castle nut washer. I guess I assumed it would come with those but when I re-looked it up they’re not included. So I guess I should have ordered those at the same time, too. After a trip to the hardware store I cleaned everything up, packed my bearings and assembled the hubs onto my spindles. Everything went perfectly well and they fit and work great. I think there’s some room for packaging improvement but in the end it’s still a 5-star review.

Perfectly! No problems and everything works like new.
Brian C - 02/27/2019


Arrived quickly and all parts fit perfe ctly!


Top notch customer service!! etrailer comes through again!!


The axles came in and where packed well. Installed them with no problems. The only issue I had was the instruction sheet says to torque nut to 200ft lbs then back off 1 turn then 50ft lbs then back off 1/4 turn. But from watching the installation videos you have on line they just tighten so the hub spins tightly then back off and finger tighten. 200 ft lbs is a bit extreme on a greased nut and bolt!


The product is great, price is outstanding. The only problem we have is you won’t ship to Alaska. That’s right I live in Alaska, so every time I need your product, I have to have it shipped to a relitive and have them mail it to me. Will never understand why you guys have to charge an arm and leg to get your product up here. We are the United States really we are. That’s some to work on “Shiping to Alaska” cheep!!!


2 complete, good quality hubs for a great price.Only had to order different grease seals to make these fit my coleman popup.


Fast shipping, excellent pricing and quality. Order cake shipped perfectly in a container that prevented any damage. I ordered tires and rims as well. The tires were installed on the rim and filled with air. Highly recommended.


Got tires and rim for my sled trailer they are blems you can't tell they look pretty good haven't but them on yet waiting on my hubs to come


Product looks ok, fit perfect , the grease cap came in crushed ,but I did not use it anyway. Time will tell how the bearings hold up.


first time to order from etrailer. good experience . making a second order today. delivery was quick.


Great people to deal with


I ordered on Monday, it was there Tuesday afternoon, back on the road Wednesday.

after a year everything is rolling along as it should !!
jim r - 10/26/2017


Product exactly as stated and in new condition as expected. Install was a breeze. Shipping was slower than expected. Would buy again.


Great Price, perfect fit and delivery was fast. Perfect!


Great quality, great price.



See what our Experts say about this Timbren Trailer Hubs and Drums

  • Diameter of Hub Face on TA88545-2
    The diameter of the hub face is 5-1/2 inches on the # TA88545-2 that you referenced.
    view full answer...
  • How Long are the Studs on Timbren Idler Hubs # TA88545-2
    The studs on idler hubs # TA88545-2 are approximately 1-7/8 inches long. This is a fairly standard size for hubs of this capacity. I have linked a video review of this hub set for you.
    view full answer...
  • Compatibility of Timbren Trailer Idler Hub Assemblies with 1 Inch Spindle Axles
    The Trailer Idler Hub Assembly for 2,500-lb Axles - 5 on 4-1/2 # TA88545-2 are the correct fit for your 1 inch straight spindles. The L44649 bearings are 1.063 inches inner diameter which are compatible with what are typically referred to as 1 inch straight spindle axles. They will work perfectly on your Snowbear trailer with your EZ Lube grease caps.
    view full answer...
  • Grease Seal Recommendation To Replace Seal with ID of 1.25 and Outer Diameter of 1.983
    The grease seal you need is the part # 34823. 4 thousandths of an inch is a tiny amount and realistically it's within the margin of error on the caliper you are using. This seal will work just fine and is the correct one for the hub you have. Ideally though you need to measure again and verify that you just maybe were slightly off with your initial measurement.
    view full answer...
  • Does Trailer Idler Hub Assembly for 2,500 lb Axles Fit 1 Inch Straight Spindle
    The Trailer Idler Hub Assembly for 2,500-lb Axles - 5 on 4-1/2 # TA88545-2 uses inner and outer bearing # L44649, which has a 1.063 inch inner diameter and does fit what is commonly referred to as a 1 inch straight spindle.
    view full answer...
  • Replacement Hub For 2007 Marine Master Trailer With UFP 2,000 Lb Axle
    Your axle is a UFP axle which is made by Dexter Axle. I contacted them with your serial number and they were able to tell me your axle is a 2,000 lb axle with a 76" hub face to hub face and 62" spring center to spring center. The bearings are inner and outer part # L44649. Dexter said your original hub is a 2,500 lb idler hub. You can replace your idler hub assembly with Trailer Idler Hub Assembly for 2,500-lb Axles - 5 on 4-1/2 part # TA88545-2 that uses the inner/outer bearings part...
    view full answer...
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  • Will the Trailer Idler Hub Assembly for 2,500 Lb Axles Fit a Triton Snowmobile Trailer
    The Trailer Idler Hub Assembly part # TA88545-2 uses two L44649 bearings which measure 1.063" inner diameter. It's common on 2,500 lb axles so if this is what you have it will work. The other common bearing for this size trailer is a L44643 which measures 1" inner diameter and in which case you'd use the Dexter Trailer Idler Hub Assembly part # 34822545BX. I have attached a help article to look over with bearing measuring help.
    view full answer...
  • Correct Grease Seal for Idler Hub Assembly TA88545-2
    The proper grease seal for idler hub assembly # TA88545-2 is the 10-60 seal, which is # RG06-020.
    view full answer...
  • What Hub will Fit My BTR Spindle and is Compatible with an 8-Inch Wheel?
    It sounds like you are wanting a BTR Spindle compatible hub for 8" wheels. A BTR spindle uses inner and outer bearings L44649 so in this case you would want Trailer Idler Hub Assembly for 2,000-lb Axles - 4 on 4 - L44649 Bearings - Pre-Greased # AKIHUB-440-2-2K for a 4 on 4 lug pattern or Trailer Idler Hub Assembly for 2,500-lb Axles - 5 on 4-1/2 - Qty 2 # TA88545-2 for a 5 on 4-1/2 lug pattern.
    view full answer...
  • Does Timbren Axle Less System A20RS545 have Rim Diameter Restrictions
    The hub that comes with the Timbren part # A20RS545 that you referenced is the part # TA88545-2 which does not have the same rim diameter restriction as other hubs do.
    view full answer...
  • Replacement Hubs for 2006 Aliner Expedition Folding Camper with 2.5K Axle
    A 2500 lb axle would typically feature a spindle that's compatible with the L44643 inner and outer wheel bearing. I'd recommend checking the bearing cages on your existing bearings for the reference number just to confirm. We offer 2500 lb capacity compatible idler hubs with a 4 on 4 or 5 on 4-1/2 inch bolt pattern. For a pre-greased hub compatible with a 4 on 4, I'd recommend the # CE13110 or for a 5 on 4-1/2 inch bolt pattern, use part # CE13210. The hubs are sold individually, bearings,...
    view full answer...
    Image 1 for
  • Replacement Idler Hubs for 2500 lb Axle With 5 on 4-1/2 Bolt Pattern
    The 2500 lb axle uses a straight spindle which is compatible with either the L44649 or L44643 inner and outer bearings. Your existing bearings will have the reference number etched into the side of the bearing cage for easy identification. We have one 5 on 4-1/2 inch bolt pattern option for each bearing set. If you have the L44649 bearings, use the Timbren # TA88545-2 which are sold in pairs only. If you have the L44643 bearings, use the CE Smith # CE13210 which is avilable individually. Either...
    view full answer...
  • What is the Hub Bore on the Hubs that Come with the Timbren Axle-Less Suspension System
    The Timbren Axle-Less Trailer Suspension System with Hubs part # A20RS545 uses the Trailer Idler Hub Assembly for 2,500-lb Axles part # TA88545-2. The bore diameter on these hubs are 1.961". I have linked the page for the hubs and videos on both products for you to check out. .
    view full answer...
  • Recommended Hubs for a Snowmobile Trailer With 8 Inch Wheels
    The 8 inch wheels that you have does make things a little more difficult, but we do have an option available. With that being said, I recommend going with the Timbren Trailer Idler Hub Assembly for 2,500-lb Axles - 5 on 4-1/2 - Qty 2 # TA88545-2. These are specifically designed to be used with 8" to 10" wheels and does have the 5 on 4.5 bolt pattern. These come with all the needed bearings, seals, caps, and lug nuts. They are also rated for use up to 2,500 pound trailer axles, so they...
    view full answer...
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  • What is the Length of the Trailer Idler Hub Assembly # TA88545-2
    I went out to the warehouse and found that the total length of the Trailer Idler Hub Assembly # TA88545-2 is 4-1/4". If you have a straight spindle with a diameter of 1-1/16" then the 2 # L44649 bearings should fit just fine, just note that the grease seal has an inner diameter of 1.50" so you will need to make sure that corresponds to what you have. If all of that checks out then this hub will fit! Always use the same grease that you used the last time that everything was greased. Different...
    view full answer...
    Image 1 for
  • Idler Hubs For CE Smith 1,800LB Axle That allow For a 15" Wheel and Tire Package
    Yes, the Trailer Idler Hub Assemblies # TA88545-2 are two 5 on 4-1/2" bolt pattern idler hubs that will fit the CE Smith Trailer Axle Beam with EZ-Lube Standard Spindles # CE33201GA. These will allow for you to mount a 15" wheel and tire like the Loadstar ST205/75D15 Bias Trailer Tire w/ 15" Galvanized Wheel # AM3S650.
    view full answer...
  • Hubs for 2,500 Pound Axle with Straight 1 Inch Spindle
    The Timbren Idler Hub Assembly # TA88545-2 referenced in your question is designed for 2,500 pound axles and it uses the # L44649 inner and outer bearing. This particular bearing features an inner diameter of 1.063 inches, so I highly recommend verifying the measurements you took on your spindle with a digital caliper like # 301-17068. If you do have 2,500 pound axles and the spindle is in fact 1 inch exactly, then the correct idler hub assembly will actually be the CE Smith # CE13210....
    view full answer...
  • Replacement Hub and Spindle for 2014 Ranger Trailer
    In order to find the correct replacement hub and spindle you will need to know the capacity of your axle along with the bearings you currently have. In order to find the size of the bearings you can look for part numbers on your existing bearings. If these have worn off, you will need to measure the bearings/spindle. See the diagram below showing where to measure. If you find that you have an inner diameter of 1.063" then you can use the Dexter Trailer Idler Hub Assembly for 2,200-lb...
    view full answer...
    Image 1 for

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