fooferdoggie 

for some reason bulls put this strange mounted back rack on their bike. the bracket is part of the disc brake mount. I jsut want a rack that has one top bar it makes it harder to drop my pannier onto it. but I don't know if there is a rack that would replace it.

oldbobcat

That rack may have been part of a child carrier.

Of course you can replace it. My preference is Bontrager's Backrack models, but ToPeak makes a good line called Explorer. You should select a model that's compatible with disc brakes.

fooferdoggie 

no it came with the bike. it had a stupid spring clamp on top. but if you look the disc caliper bolts run through it. thats real odd not sure how a regular rack would mount. this is a e bike built around the mid drive.

Andrew R Stewart 

Many low cost E bikes don't follow the typical bike industry norms for parts and/or accessories.

I suspect the rack will do rack duty just fine but that it mounts with the same bolts as the brake caliper I think is so wrong. Rack bolts are well known for their tendency to loosen over time and use. I sure wouldn't want my brake to also come loose... Andy

tyrion

I think you could use just about any rear rack and attach the bottom to either of those attachment points on the brake adapter mount. Use the hole that puts the rack at the height you prefer. Just get a shorter bolt for the brake mount hole the rack isn't using.

Edit: you might need a rack with a little standoff to make it clear the brake caliper. Many rack makers make disc specific version, like this Topeak Explorer Disc:

fooferdoggie 

this is not a low end bike its a bulls bike at 3700.00 but the rack is the only oddball part on it everything else is stock bike parts.

fooferdoggie 

I will check it out. the rack on it is rated for about 50 pounds. I don't carry that much but I can carry 30 pounds or so.

Andrew R Stewart 

Understood. It seems that non traditional accessory design is part of your bike too. Andy

fooferdoggie 

I nave noticed the racks seem different. both my e bikes had that stupid mousetrap spring on the top of the rack and a strange design. I can live with it but I miss the ability to drop the bag on one handed. this bike was designed for fast commuting so its a bit of a oddball.

dedhed

It doesn't appear the bike is set up for seatstay rack mounts like a conventional rack. Not that P clips aren't an option.
​​​​​​https://www.bullsbikesusa.com/twenty8-e45-diamond.html

fooferdoggie 

it is connected right below the seat. there is a bar that connects it on the inside of the fender to the cross section of the frame. so its goes through the fender at the end of the rack then connects to the crossmember through a tapped hole. so it may not be practical to replace it.

oldbobcat

Those are good. So are these:

Either way, it looks like you will need a pair of P-clamps to attach the rack stays to the seat stays, or a monostay adapter to attach to the seat tube, as it appears your seat stays have no eyelets. About six bucks. Your dealer will explain these.

fooferdoggie 

with the tai-light wire and fender mount and hassle with the brake mount I doubt its worth the effort to change over. plus I would only want a flat bar on the bottom. its so much easier to deal with.

dedhed

Let's see a picture of the complete unit and how the pannier mounts

fooferdoggie 

I will get a little closer tomorrow.

Ross200

This "oddball" rack looks like a creative clone of the very well regarded and popular Tubus/Racktime rear racks. IS disc mounts don't play well with many rear racks and the panniers rub on the brake caliper over time. Ortleib panniers drop right on the lower rail without disturbing what you have mounted on the platform. It seems to be a common European commuting/touring setup.

dedhed

So the issue is the top main frame bar forming the "platform" interferes with placing your pannier on the lower bar.

fooferdoggie 

right because the Ortleib panniers tend to tip away when they are loaded. it's not a huge deal just a bit of an annoyance. .