Why is My New Dexter Idler Hub Have a 1-2mm Gap at Spindle Where Bearing Goes?

Updated 02/04/2025 | Published 01/31/2025

Products Featured in This Question

Dexter Trailer Idler Hub Assembly for 2,200-lb Axles - 5 on 4-1/2 - Galvanized

(141)

$76.29

4" Carbon Fiber Digital Caliper

(26)

$12.26

Question:

Got new hubs and bearings. Bearings same model number I took off 44549 but there is 1-2mm space between inner race and my spindle. Bearing is very loose on spindle.

asked by: Greg S

Expert Reply:

Hello Greg,

Well that's not good. I see that the Dexter Idler Hub # 8-259-50UC1 has bearings for a straight spindle with both inner and outer bearing L44649 (I am hoping the 44549 was a typo) with inner diameter 1.063". It is very possible that your spindle could be worn. Can you please use something like a digital caliper # PTW80157 to confirm that is the measurement you are getting on your spindle? I know it is a pain to get those greasy bearings out, but if you could please measure the inner diameter of the bearing as well. Also, is it just one bearing or both? I included a chart so you know where to measure on the spindle.

Once you get those measurements, please hit the "REPLY TO KATE F" below to let me know what you come up with. I appreciate your time, and look forward to hearing back from you.

expert reply by: Kate F

Where to measure spindle for bearings.
(click to enlarge)

Greg S.

2/4/2025

I have a Continental trailer, and apparently they use true 1" axles. The 44643 bearings have a 1" inner but use the same outer race so should be compatible with my hubs.

Kate F.

2/4/2025

@GregS Hey there Greg, so in your orders I see that the Dexter Trailer Idler Hub Assembly for 2,200-lb Axles - 5 on 4-1/2 - Galvanized # 8-259-50UC1 was ordered on 01/22/25, that hub has bearings L44649 which is 1.063" inner diameter, what you really need is the Dexter Trailer Idler Hub Assembly for 2,000-lb Axles - 5 on 4-1/2 - Galvanized # 8-258-50BTUC1 as it has both inner and outer bearing L44643 at exactly 1" inner diameter. Did you only try to install the hub and not use it?