Cycling UK Forum

KM2 wrote: ↑23 Mar 2024, 10:42pm Could it be that it falls under …..items away from home…. and therefore insured under your house insurance?

Ha well let's see how the repair goes!

rogerzilla wrote: ↑23 Mar 2024, 9:05pm That should be ok with a brass fillet. I thought it would be one of those corkscrew cracks you often see at the base of the seat tube.

Thanks. I've got silicon bronze rather than brass- any reason that won't be suitable?

Ah I was hoping that wasn't the case.... but credit to Spa for using good steel. Thanks everyone for the quick replies.

With the different steels of the frame and bracket shell, I'm inclined to take Colin's suggestion and TIG braze a big fillet in a few passes, minimising heat and using pulse. I have some silicon bronze TIG brazing rods to hand and will preheat a bit with a gas torch. Any other advice welcome.

You can hopefully see it here (I don't seem to be able to upload images so I have linked):

https://drive.google.com/file/d/1mMxdnK ... sp=sharing

Thanks

Hi everyone,

My stepson has been happily cycling to school for the last three years on his Spa Tourer 540. At the last service the mechanic pointed out a hairline crack where the bottom bracket meets the down tube.

I have some experience TIG welding light gauge tubing so I feel confident repairing it if it isn't an exotic/ heat treated steel.

I'm not sure what the frame alloy is as there are no labels and I haven't been able to find any information on this model online (we bought it second hand). I am assuming Chromoly 4130 but does anyone know?

I have tried calling Spa a couple of times but haven't been able to get through. Their warranty is also only valid with the original purchase documentation.

Thanks!

Felix