Interest in custom ISP topper for Giant Propel Advanced sl?
Moderator: robbosmans
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I don’t because I haven’t had it made yet. The cost comes down if I buy more than one. I haven’t had a chance to drop my topper off for them to start working but once I do, if none else commits it’ll be a one off.
I’d enquirer at the shop to see if they’re the same. From pictures they look like it but I can’t guarantee anything.
I’d enquirer at the shop to see if they’re the same. From pictures they look like it but I can’t guarantee anything.
I got side tracked and didn’t follow through...yet. I found a few more places to shed some weight for cheaper and had none else really interested enough for me to front all the money and end up with 3-4 toppers lying around with an empty wallet.
I'm going to venture on this a little bit:
Took the topper off today; 128 grams (note; it comes in a short and a long version, this being the short one) I'm guessing that the longer-sleeved topper must be 160-ish.
10 grams are the spacers that I have in there. About 20mm/3/4", so 118gr for the topper itself.
You are left with 3 things that make this 118 grams:
1. the Alu sleeve; 50 grams
2. The Alu clamp for the seat rails; 51 grams
3. 3 steel bolts to keep it all together; 17 grams
1 - no idea how to replace, other than cutting it in half and glueing the bastard on the seatpost . Let's not go there.
2. Alu rail clamp can be exchanged for a generic carbon item of fleabay or Ali. Should save 50% in theory
3. Replace 3 bolts by Ti ones. Should save 33%
Cost; 40$
Saving/new weight --> -30 grams/88 grams
Main weight disadvantage over non-ISP is the 50 gram sleeve for which a light clamp would be used for a normal seatpost. I've seen them as light as 10 grams, but normal light clamps double that; 20 grams. If that upsets you, cut the sleeve to a minimum and glue the top half on your seatpost.
Please tell me if I'm wrong?
Took the topper off today; 128 grams (note; it comes in a short and a long version, this being the short one) I'm guessing that the longer-sleeved topper must be 160-ish.
10 grams are the spacers that I have in there. About 20mm/3/4", so 118gr for the topper itself.
You are left with 3 things that make this 118 grams:
1. the Alu sleeve; 50 grams
2. The Alu clamp for the seat rails; 51 grams
3. 3 steel bolts to keep it all together; 17 grams
1 - no idea how to replace, other than cutting it in half and glueing the bastard on the seatpost . Let's not go there.
2. Alu rail clamp can be exchanged for a generic carbon item of fleabay or Ali. Should save 50% in theory
3. Replace 3 bolts by Ti ones. Should save 33%
Cost; 40$
Saving/new weight --> -30 grams/88 grams
Main weight disadvantage over non-ISP is the 50 gram sleeve for which a light clamp would be used for a normal seatpost. I've seen them as light as 10 grams, but normal light clamps double that; 20 grams. If that upsets you, cut the sleeve to a minimum and glue the top half on your seatpost.
Please tell me if I'm wrong?