Each of the Dexter Nev-R-Adjust Electric Trailer Brake Kit - 10" - Left and Right Hand Assemblies - 3.5K # 23-468-469 you were looking at include a left and right side braking assembly. Since your 2012 Keystone Bullet Premier 31' has two axles you would need to order a quantity of two kits.
I included a few videos of the # 23-468-469 for you to take a look at. view full answer...
A 60 amp converter like the Progressive Dynamics part # PD9260C would work great on your two 6 volt golf cart batteries wired in series. This will charge them quickly. view full answer...
For the wider wheelbase trailers like yours we have the Equa Flex part # LC314336 which has a distance of 14-5/8 inches between the shackle bolt holes. We've found this is the correct size for the 42 inch wheelbase trailers like yours. view full answer...
The E-Z Flex Equalizer for 1-3/4" Double Eye Springs - 8-3/8" Long - 9/16" Center Hole # 013-146-03 is the best upgrade option for each equalizer your 2019 Keystone Bullet 243BHS. This will give you a suspension upgrade with integrated shock absorbers. Then you can use the Lippert Components Tandem Axle Equa-Flex AP Kit - Wet Bolts - 3-1/8" Long Shackles # LC64FR which when paired will work well on your trailer. view full answer...
It sounds like you have the 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 25-1/8" Long # e54SR on your 2019 Keystone Bullet. I recommend relieving the weight off the suspension to see if the springs return to normal heights. I have included the picture below for reference for the following measurements.
A-12-9/16"
B-13-3/16"
C-25-1/8"
D-3-1/4"
The trailer may have became overloaded and caused damage to the suspension components or even the axle. If you notice an excessive bend... view full answer...
I may have a solution for you, but we do not have any 12" trailer wheels with a metric bolt pattern. However, typically trailer hubs will have a standard bolt pattern that is measured in inches, so a standard 5 on 4-1/2" bolt pattern wheel should work for you. I will link an article on how to measure the bolt pattern on your wheel if you cannot find it anywhere on your hubs or current wheels.
I recommend using the Dexstar Mini Mod Trailer Wheel # AM20153 which has a 5 on 4-1/2 bolt pattern... view full answer...
I wish we could help but we don't have any 30-1/4 inch mono leaf springs. We have a 30 inch 6 leaf spring part # UG34FR which is for a 5,000 lb axle. view full answer...
Typically in this situation you'll either have to move the strut further up on the door clear of the SolidStep Manual Fold-Down Steps for 25" to 28-7/8" RV Door Frames - Quad - Aluminum # LC791574 or use a door stop like the Plastic Stem and Rubber Socket Door Holder - 2" Long Stem # DH39R to create a bumper between the door and exterior wall. view full answer...