A customer left a Bora One 50 rear wheel with us.
It was damaged in a crash caused by getting tangled up during a race
and several spokes are bent.
↑I've relieved the tension here to make it clearer,
but both of the parallel spokes on the freewheel side are bent.
The customer said I could replace anything I deemed damaged,
and it ended up being 4 spokes in total.
Separately, there's another Bora 50 from the same generation
where all 14 spokes on the freewheel side need replacing,
and we're expecting the inventory to arrive soon,
so if this Bora One 50 had consumed too many spokes, we might have run short.
Glad it was just 4.
That's pretty amazing.
Since I was replacing 4 spokes, there's no point in checking the temporary center,
so I first trued it with just the nipples on the 4 replaced spokes,
then did some fine tuning on a few other slight runouts,
and only then applied the centering gauge—
and it was dead center right away.
It was already at its natural position,
so it felt like I was just guided there naturally.
Unlike the CLX 64 from the previous post,
this Bora has no inspection history at our shop.
Since it's from the first owner, the history is clear,
but it had been used straight from the factory as-is.
Fixed.
The replaced spokes
were all in nearly continuous phase on the freewheel side,
but oddly enough, right there in the middle of them,
there was one spoke that wasn't bent.
↑The replaced spokes.
The 3 at the top of the image
have large deformation in the front-to-back direction,
but the bottom one has deformation in the side-to-side direction.
There's an impact mark at the beginning of the deformation.
I held a ruler against it.
The start of the bend is around the 60 mark on the ruler,
and it matches the impact mark.
From the same crash, the 11-speed Chorus EPS rear derailleur (electronic shifting system) exploded.
The cable is also severed.
The motor unit + connector cable can only be serviced at the Campagnolo service center, not at regular shops.
The spare parts number for the EPS version made for Athena EPS
is RD-AT005EPS,
but it was removed from the spare parts catalog at the end of 2022.
For reference, the retail price including tax was ¥54,315.
The Record EPS version of the same part is
RD-RE005EPS at ¥55,965 including tax,
and the Super Record EPS version is
RD-SR005EPS at ¥57,243 including tax.
The official name of this Chorus rear derailleur is
RD15-CH1EPS, as shown on the QR code sticker
that you basically can't peel off without intentionally trying to.
Breaking down this part number:
RD = rear derailleur
15 = first introduced in 2015
CH = Chorus grade
1 = 11-speed
EPS = EPS groupset, as is
However, from 2023 onwards, they've been selling the entire rear derailleur for 11-speed repairs,
and the naming convention changed slightly.
For Record, it's RD-11RE EPS1SP (retail price ¥141,706 including tax),
and for Super Record, it's RD-11SREEPS1SP (retail price ¥176,009 including tax).
At least money can fix it—
with Shimano, even the RD-9070 pulley cage is discontinued
Until last year, motor unit replacement was possible,
but from 2023, the official repair method is
replacement with a new spare rear derailleur only.
And with the way this one broke—
the mount bolt area exploded—
a motor unit replacement wouldn't have fixed it anyway.
So I thought, what do I do? Help!
I sent the actual rear derailleur to a wholesale distributor
that knows Campagnolo better than anyone in Japan and consulted them.
It turned out they had new stock of the same part in the Japanese warehouse,
so (of course it cost money, but)
this time we managed to sort it out with that.
While the rear derailleur is in this state,
the frame side wasn't damaged—
even the derailleur hanger didn't bend,
which means there's no fatal damage in terms of being able to ride it.
The inside of the right chainstay had a spot where the chain hit hard
at a position where it wouldn't normally touch,
and the paint was chipped,
but that was all.
We replaced the chain too.
Actually, we had to.
The image above is the original chain,
and when arranged so the outer plate contacts the floor,
around here the chain contacts the floor straight,
but at the section where it appears to have jammed in the rear derailleur,
deformation occurred.
When arranged in a circle so there's no chain-to-chain contact...
↑you get stuff like this,
↑and like this.
I asked the customer how many miles the chain had been used.
If it was relatively low mileage,
I was thinking I could patch it up cheaply
by replacing the deformed section with scraps from a new chain.
But the stated mileage exceeded the chain replacement interval,
and the actual pin-to-pin distance had stretched,
and while chain scraps are usually about 3 or 4 links,
replacing the jammed section would require
4 of the special pins that cost ¥1,288 each including tax,
so I just went ahead and happily replaced it with a new chain.
Campagnolo chain tool
with scraps accumulating in the box below.
It was damaged in a crash caused by getting tangled up during a race
and several spokes are bent.
↑I've relieved the tension here to make it clearer,
but both of the parallel spokes on the freewheel side are bent.
The customer said I could replace anything I deemed damaged,
and it ended up being 4 spokes in total.
Separately, there's another Bora 50 from the same generation
where all 14 spokes on the freewheel side need replacing,
and we're expecting the inventory to arrive soon,
so if this Bora One 50 had consumed too many spokes, we might have run short.
Glad it was just 4.
That's pretty amazing.
Since I was replacing 4 spokes, there's no point in checking the temporary center,
so I first trued it with just the nipples on the 4 replaced spokes,
then did some fine tuning on a few other slight runouts,
and only then applied the centering gauge—
and it was dead center right away.
It was already at its natural position,
so it felt like I was just guided there naturally.
Unlike the CLX 64 from the previous post,
this Bora has no inspection history at our shop.
Since it's from the first owner, the history is clear,
but it had been used straight from the factory as-is.
Fixed.
The replaced spokes
were all in nearly continuous phase on the freewheel side,
but oddly enough, right there in the middle of them,
there was one spoke that wasn't bent.
↑The replaced spokes.
The 3 at the top of the image
have large deformation in the front-to-back direction,
but the bottom one has deformation in the side-to-side direction.
There's an impact mark at the beginning of the deformation.
I held a ruler against it.
The start of the bend is around the 60 mark on the ruler,
and it matches the impact mark.
From the same crash, the 11-speed Chorus EPS rear derailleur (electronic shifting system) exploded.
The cable is also severed.
The motor unit + connector cable can only be serviced at the Campagnolo service center, not at regular shops.
The spare parts number for the EPS version made for Athena EPS
is RD-AT005EPS,
but it was removed from the spare parts catalog at the end of 2022.
For reference, the retail price including tax was ¥54,315.
The Record EPS version of the same part is
RD-RE005EPS at ¥55,965 including tax,
and the Super Record EPS version is
RD-SR005EPS at ¥57,243 including tax.
The official name of this Chorus rear derailleur is
RD15-CH1EPS, as shown on the QR code sticker
that you basically can't peel off without intentionally trying to.
Breaking down this part number:
RD = rear derailleur
15 = first introduced in 2015
CH = Chorus grade
1 = 11-speed
EPS = EPS groupset, as is
However, from 2023 onwards, they've been selling the entire rear derailleur for 11-speed repairs,
and the naming convention changed slightly.
For Record, it's RD-11RE EPS1SP (retail price ¥141,706 including tax),
and for Super Record, it's RD-11SREEPS1SP (retail price ¥176,009 including tax).
with Shimano, even the RD-9070 pulley cage is discontinued
Until last year, motor unit replacement was possible,
but from 2023, the official repair method is
replacement with a new spare rear derailleur only.
And with the way this one broke—
the mount bolt area exploded—
a motor unit replacement wouldn't have fixed it anyway.
So I thought, what do I do? Help!
I sent the actual rear derailleur to a wholesale distributor
that knows Campagnolo better than anyone in Japan and consulted them.
It turned out they had new stock of the same part in the Japanese warehouse,
so (of course it cost money, but)
this time we managed to sort it out with that.
While the rear derailleur is in this state,
the frame side wasn't damaged—
even the derailleur hanger didn't bend,
which means there's no fatal damage in terms of being able to ride it.
The inside of the right chainstay had a spot where the chain hit hard
at a position where it wouldn't normally touch,
and the paint was chipped,
but that was all.
We replaced the chain too.
Actually, we had to.
The image above is the original chain,
and when arranged so the outer plate contacts the floor,
around here the chain contacts the floor straight,
but at the section where it appears to have jammed in the rear derailleur,
deformation occurred.
When arranged in a circle so there's no chain-to-chain contact...
↑you get stuff like this,
↑and like this.
I asked the customer how many miles the chain had been used.
If it was relatively low mileage,
I was thinking I could patch it up cheaply
by replacing the deformed section with scraps from a new chain.
But the stated mileage exceeded the chain replacement interval,
and the actual pin-to-pin distance had stretched,
and while chain scraps are usually about 3 or 4 links,
replacing the jammed section would require
4 of the special pins that cost ¥1,288 each including tax,
so I just went ahead and happily replaced it with a new chain.
Campagnolo chain tool
with scraps accumulating in the box below.