Rear bicycle light options

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david k

Hi
Location
North West
I'm setting up my winter bike which is a btwin540 mountain bike about 6/7 years old.

I've done some general upgrades but have an issue with mounting my rear light.

I want to add a mudguard, I have a seat bag and this leaves little room for a light where it can be seen.

I've had to remove an old light from the seat bag by cutting the little strap so now have no loop to mount a light.

Short of a new seat bag what are my options?

I've considered cutting small holes in the seat bag to mount the light. Putting them on the rear wheel bars ( not sure correct term) or mounting them on top of the mudguard somehow.

Anyone created anything that works well? Photos would be helpful if anyone had some

Thanks
 

Ming the Merciless

There is no mercy
Location
Inside my skull
What’s wrong with a light on the seat stays? The other other option is a mudguard light if your guards aren’t made of cheese.
 

dicko

Guru
Location
Derbyshire
This is my set up, I do

IMG_4532.jpeg


have them flashing alternatively when I’m about on the toads.
 

si_c

Guru
Location
Wirral
I'd sew another loop onto the seat bag if possible where the old one was, but it really depends on how much seat post you have exposed and where the mudguards are mounted.

If you have a couple of photos @david k then we might be able to help better.
 

88robb

Regular
Location
Netherland
I'm setting up my winter bike which is a btwin540 mountain bike about 6/7 years old.

I've done some general upgrades but have an issue with mounting my rear light.

I want to add a mudguard, I have a seat bag and this leaves little room for a light where it can be seen.

I've had to remove an old light from the seat bag by cutting the little strap so now have no loop to mount a light.

Short of a new seat bag what are my options?

I've considered cutting small holes in the seat bag to mount the light. Putting them on the rear wheel bars ( not sure correct term) or mounting them on top of the mudguard somehow.

Anyone created anything that works well? Photos would be helpful if anyone had some

Thanks

Mudguard mount is best. Strap or bolt a light directly to the back of the guard. It's perfectly placed.

Seatpost clamp. If there's a sliver of seatpost below your bag, a small rubber-strap light will fit.

Cut the bag. Feed a zip-tie through two small slits to create a new mount. It works but changes the bag permanently.
 
OP
OP
david k

david k

Hi
Location
North West
I already have this photo but will take a better one when I get chance.

Once I get my mudguard on it won't leave much space

I have two small strap lights already on but I'm worried they won't been seen easy when the mudguards on
IMG20250927104820.jpg
 

wiggydiggy

Legendary Member
If you zoom in I have 3 on the back. 2 are on the rack, below the bag, and one on the bag.

You can't see it very well but the support rack I have for the bag, I used to have one there as well.

IMG-20250906-104540123.jpg
 
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