Disc Pad Confusion

g0g

Looking for some guidance on disc pad compatability.

Recently needed to change pads on a 2021 105 bike with hydraulic disc brakes. Outgoing pads were L03A with the fins. Couldn't get same again so shop put in K03S. I see some L03A available online so might buy them for future supplies.

Separately I have a 2019 bike with Tiagra Hydraulic Disc brake setup and I'm pretty sure rear pads are gone/going. Rather than have a load of shops tell me they don't have stock I'd rather just buy in advance. Bike spec says brakes are BR-RS405. Is knowing it's BR-RS405 enough for me to figure out which pads to buy?

I found this chart which seems to cover the topic in detail.

https://shimanobikes-nz.prontoavenue.biz/ts1570079501/attachments/Page/20/Disc%20Brake%20Pad%20Compatibility%20Chart.pdf

My questions

1) Am I correct saying any K03, K04 or L03 will do the job? Or is there more I need to consider?

2) Will both the 105 (above) and Tiagra hyd brake setup take both finned and non finned pads? I have found both L03A and K03S available online and based on the chart it seems to suggest both will work.

Thanks 🙂

NeedMoreGears

https://bike.shimano.com/en-EU/product/component/tiagra-4700/BR-RS405-F.html

https://dassets.shimano.com/content/dam/global/cg1SHICCycling/final/ev/ev/EV-BR-RS405-4020C.pdf

Have a look at the above.

g0g

Nice one thanks got sorted. And to anyone else who comes across this thread, seems like for my 105 and Tiagra hydraulic both would have accepted fin or no fin. The 105 came with finned on purchase L03A and the Tiagra bike had non finned.