Embarrassingly dumb question about caliper brakes

[RhythMick]

Just bought my first proper road bike with caliper brakes (SRAM RIVAL 22 on Planet RT-58 Carbon Frame).

I want to move my dynamo light (B&M Luxos U) to the RT-58. I can see on the rear brake there's a nut with a 5mm hex socket and presumably the front is the same, but the hole in the fork within which MUST be that 5mm nut is

a) quite deep
b) full of crap after only 120 miles riding

Now I think the answer is obvious - wash the crap out and find the nut, grip it with a 5mm hex driver while use a 12mm spanner on the caliper nut. This being my first proper road bike, and it being carbon, and knowing my own inexperience - I just wanted to check before getting in there.

Once it's done and all back to normal, is it worth plugging that hole to stop it filling full of crap ?

https://sram-cdn-pull-zone-gsdesign...-005-000_rev_a_sram_22_shifter_dual_pivot.pdf

 

[RhythMick]

And this from the SRAM Frame Design Spec, so I'm pretty sure I'm right.

 

[fossyant]

Yup. Undo the hex bolt on rear of fork

 

[RhythMick]

Thanks. Knew it was a dumb question.

 

[Smokin Joe]

Thanks. Knew it was a dumb question.

No such thing as a dumb question, we all have to learn and we all started out knowing nothing.

 

[lpretro1]

Just bought my first proper road bike with caliper brakes (SRAM RIVAL 22 on Planet RT-58 Carbon Frame).

I want to move my dynamo light (B&M Luxos U) to the RT-58. I can see on the rear brake there's a nut with a 5mm hex socket and presumably the front is the same, but the hole in the fork within which MUST be that 5mm nut is

a) quite deep
b) full of crap after only 120 miles riding

Now I think the answer is obvious - wash the crap out and find the nut, grip it with a 5mm hex driver while use a 12mm spanner on the caliper nut. This being my first proper road bike, and it being carbon, and knowing my own inexperience - I just wanted to check before getting in there.

Once it's done and all back to normal, is it worth plugging that hole to stop it filling full of crap ?

https://sram-cdn-pull-zone-gsdesign...-005-000_rev_a_sram_22_shifter_dual_pivot.pdf

Buy some mudguards for wet weather then the crap won't get in!

 

[Tim Hall]

You might need a longer hex bolt once the light is fitted, as the bracket takes up some of the space, if you see what I mean. Readily available from online suppliers or Real Bike Shops.

 

[Smokin Joe]

You might need a longer hex bolt once the light is fitted, as the bracket takes up some of the space, if you see what I mean. Readily available from online suppliers or Real Bike Shops.

I like your style, Tim.

Perhaps it's time for a "Campaign For Real Bike Shops" group? We could call it CAMREBIKS.

 

[tincaman]

Just bought my first proper road bike with caliper brakes (SRAM RIVAL 22 on Planet RT-58 Carbon Frame).

I want to move my dynamo light (B&M Luxos U) to the RT-58. I can see on the rear brake there's a nut with a 5mm hex socket and presumably the front is the same, but the hole in the fork within which MUST be that 5mm nut is

a) quite deep
b) full of crap after only 120 miles riding

Now I think the answer is obvious - wash the crap out and find the nut, grip it with a 5mm hex driver while use a 12mm spanner on the caliper nut. This being my first proper road bike, and it being carbon, and knowing my own inexperience - I just wanted to check before getting in there.

Once it's done and all back to normal, is it worth plugging that hole to stop it filling full of crap ?

https://sram-cdn-pull-zone-gsdesign...-005-000_rev_a_sram_22_shifter_dual_pivot.pdf

Once you have it sorted just put some tape over the hole

 

[andytheflyer]

Put the nut back with some copper grease on the bolt threads - then it won't rust on so badly you can't get it off again. There's a recent thread on here about removing mudguards - and a problem because the caliper nut is seized on.