Busch & Muller Secula Rear Light - Mudguard Fitting

Customer Reviews (8)
4.4 / 5| Write your review
£26.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
New for 2016, this is the battery version of the popular Secula mudguard mounted dynamo light. This light is compact and incorporates the LineTec technology. A prism system which creates an exceptionally bright light crown powered by one high powered LED which is very distinctive due to its 'spatial' shape. This enables other traffic participants to better estimate the distance to the bicycle. The elegant transparent glass on the circumference shines bright red when in use. It also has a centrally integrated rear reflector and is supplied with 2 x AAA batteries.

LineTec - Light strip for more safety

LineTec is a light technology featuring a lens system designed by B&M. The punctual light of one high power LED is spread up to become a wide strip of light which shines homogenously. Why is that important? In the past, as another road user approached a bicycle at night from behind all that could be seen was a single point of light emitting from the rear light. This meant that the distance to the rider could only be estimated inadequately. B&M wanted to address the need to accurately estimate this distance providing a capacity for the human eye to register the spatial relationship to the rider, especially in the dark. Hence LineTec was created. A rear light sending out a LineTec light strip emits 'spatial light' allowing other road users to estimate the distance to the rider much better and more quickly.

- Mudguard mounted
- Single high powered LED
- Exceptionally bright LineTec light crown
- Centrally integrated rear reflector
- Compact casing 38 x 55mm
Product Reviews (8)
Questions & Answers (4) Q & A
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Product Reviews (8)
Overall Product Rating 4.4 / 5
Neat and highly visible
By All lit up
12 Sep 2020
5 / 5
I recommend this product
ConsSensitive button, may be difficult to fit.
ProsSimple, elegant, bright, light-weight, robust, good battery life.
This rear light make an excellent, permanent addition to mudguards and fits the SKS brand of mudguards with relative ease. It is bright and a set of good batteries will last a long time. I've also found that it can be fitted to a bike using one of those plastic reflector mounts that are commonly supplied with new bikes.
The only issues that I've had are the sensitive button that other reviewers have mentioned and the fact that I didn't get any warning of an impending battery fail (the light didn't gradually dim, it abruptly failed). Oh, and if the clearance between your tyre and the mudguard is less than about 5mm, you may have to shorten the end of the bolt with a hack saw.
neat mudguard fitting
By JH39
08 May 2019
5 / 5
I recommend this product
Conson off switch can be sensitive
Prosease of fitting
a bright light fits to Esge Mudguards easily.
Very good mudguard mounted rear light/reflector
By Steve
27 Apr 2018
5 / 5
I recommend this product
ConsIt is a little plasticy
ProsSpatial shape LED
Very happy with this light.

The battery warning light is functional and the LED circular shape is bright.

I buy into the idea that a spatial shape give better depth perception and also is visually distinctive with out resorting to
Simple but effective
By Anonymous
23 Feb 2018
4 / 5
I recommend this product
ConsNone yet
ProsSimple, bright and robust
Easy to fit, bright and good side and rear visibility. Also resists water pretty well, which my previous mudguard light didn't (and failed after one week of British winter). Good backup for other rear lights that can be obscured by panniers - it's position right at the back means it's always visible.
By Anonymous
27 Oct 2017
4 / 5
I recommend this product
ConsNo flash mode
ProsSturdy and easy to fit
Sturdy but pricey as no flash mode!
Bright, But Very Eay To Turn-On Accidently
By Ian Carey
27 Jun 2017
3 / 5
ConsToo easy to accidently turn it on.
ProsBright and permanently attached.
This light is very bright and permanently attached to my mudguard, so always ready. This was the main attraction.

However, it is very easy to accidently turn it on. Just moving the bike around the shed or when parking, it only takes the slightest knock to turn it on. I think that this is a design flaw.
Neat Rear Light
By Dan Kantorowich
04 Apr 2017
4 / 5
I recommend this product
ConsOnly on or off - no flashng mode
ProsSmall and light
As previous reviewer has said, pretty easy to mount. I made an additional small hole in the SKS mudguard with my penknife for the little plastic lug at the rear of the light (stops it swivelling when you tighten the mounting nut). It's on my wife's bike but I shall certainly be adding one to mine soon.
Very Good Product
By Paul B
28 Oct 2016
5 / 5
I recommend this product
ProsCompact, well made and highly visible.
I was fed up with having to unclip my rear light every time I locked my bike up and so having a neat, fixed option works very well. It also means there is always a light ready to use when I get caught out by the earlier dark evenings.
Questions & Answers (4)
Could This Be Fitted In Place Of The Existing Reflector On Sks Mudguards?
01 Jul 2017
The existing reflector seems to be in the exact place you would want to fit this light (i.e. at the lowest fixing.) It also seems to be riveted in place. Is there a trick to remove the reflector and fit this light?

The rivets on the mudguard are only for the mounts, The reflector is in fact screwed in from behind. If this screw is removed it will come off. The light in question will fit on to these mudguards.

Part No.
27 Nov 2016
According to the B&M website the part no. of what you describe should be 331BS?

This is just the part number that comes from our supplier, this is the same light as shown on B&M's website.

Modes On B&M Secula Mudguard Battery
27 Nov 2016
Modes on your part number 398111? Apart from on/off, does it have standlight, senso or flashing? Also, what batteries?

This light is permanently on so it does not have a flashing or senso function, also as it is permanently on it does not have a standlight function. This light requires two AAA batteries, there is a set supplied.

Hi, Does This Item Fit The 2 Holes On Sks Mudguards?
03 Dec 2015

This light should be able to fit to the holes already in your SKS mudguards, but if it is required you are able to drill additional holes into SKS mudguards to provide additional mounting positions.